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172
security advisorymoderatedenial of serviceUbuntu 22.04 LTS USN-5979-1 Moderate: Kernel HWE Denial of Service Threats
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-5979-1 March 28, 2023 linux-hwe-5.19 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-hwe-5.19: Linux hardware enablement (HWE) kernel Details: It was discovered that the KVM VMX implementation in the Linux kernel did not properly handle indirect branch prediction isolation between L1 and L2 VMs. An attacker in a guest VM could use this to expose sensitive information from the host OS or other guest VMs. (CVE-2022-2196) It was discovered that a race condition existed in the Xen network backend driver in the Linux kernel when handling dropped packets in certain circumstances. An attacker could use this to cause a denial of service (kernel deadlock). (CVE-2022-42328, CVE-2022-42329) Gerald Lee discovered that the USB Gadget file system implementation in the Linux kernel contained a race condition, leading to a use-after-free vulnerability in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-4382) José Oliveira and Rodrigo Branco discovered that the prctl syscall implementation in the Linux kernel did not properly protect against indirect branch prediction attacks in some situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-0045) It was discovered that a use-after-free vulnerability existed in the Advanced Linux Sound Architecture (ALSA) subsystem. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-0266) It was discovered that the io_uring subsystem in the Linux kernel contained a use-after-free vulnerability. Alocal attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-0469) It was discovered that the CIFS network file system implementation in the Linux kernel contained a user-after-free vulnerability. A local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2023-1195) It was discovered that the RNDIS USB driver in the Linux kernel contained an integer overflow vulnerability. A local attacker with physical access could plug in a malicious USB device to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-23559) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.19.0-38-generic 5.19.0-38.39~22.04.1 linux-image-5.19.0-38-generic-64k 5.19.0-38.39~22.04.1 linux-image-5.19.0-38-generic-lpae 5.19.0-38.39~22.04.1 linux-image-generic-64k-hwe-22.04 5.19.0.38.39~22.04.12 linux-image-generic-hwe-22.04 5.19.0.38.39~22.04.12 linux-image-generic-lpae-hwe-22.04 5.19.0.38.39~22.04.12 linux-image-virtual-hwe-22.04 5.19.0.38.39~22.04.12 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-5979-1 CVE-2022-2196, CVE-2022-42328, CVE-2022-42329, CVE-2022-4382, CVE-2023-0045, CVE-2023-0266, CVE-2023-0469, CVE-2023-1195, CVE-2023-23559 Package Information: https://launchpad.net/ubuntu/+source/linux-hwe-5.19/5.19.0-38.39~22.04.1 . Multiple vulnerabilities identified within the Linux kernel necessitate prompt patches for Ubuntu 22.04 LTS to maintain system stability and safeguard against potential threats.. Ubuntu Kernel Updates, Denial Of Service Risks, Linux HWE Security. . LinuxSecurity.com Team
Mar 28, 2023
Ubuntu
172
security advisorydenial of servicebuffer overflowUbuntu 22.04 LTS USN-5879-1 Critical: Linux Kernel Buffer Overflow
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-5879-1 February 16, 2023 linux-hwe-5.19 vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-hwe-5.19: Linux hardware enablement (HWE) kernel Details: Kyle Zeng discovered that the sysctl implementation in the Linux kernel contained a stack-based buffer overflow. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2022-4378) Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation in the Linux kernel contained multiple use-after-free vulnerabilities. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-42896) It was discovered that the Bluetooth HCI implementation in the Linux kernel did not properly deallocate memory in some situations. An attacker could possibly use this cause a denial of service (memory exhaustion). (CVE-2022-3619) It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform bounds checking in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-3628) It was discovered that a use-after-free vulnerability existed in the Bluetooth stack in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2022-3640) It was discovered that the Xen netback driver in the Linux kernel did not properly handle packets structured in certain ways. Anattacker in a guest VM could possibly use this to cause a denial of service (host NIC availability). (CVE-2022-3643) Tamás Koczka discovered that the Bluetooth L2CAP implementation in the Linux kernel did not properly initialize memory in some situations. A physically proximate attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2022-42895) It was discovered that an integer overflow vulnerability existed in the Bluetooth subsystem in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2022-45934) It was discovered that a race condition existed in the qdisc implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-0590) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.19.0-32-generic 5.19.0-32.33~22.04.1 linux-image-5.19.0-32-generic-64k 5.19.0-32.33~22.04.1 linux-image-5.19.0-32-generic-lpae 5.19.0-32.33~22.04.1 linux-image-generic-64k-hwe-22.04 5.19.0.32.33~22.04.9 linux-image-generic-hwe-22.04 5.19.0.32.33~22.04.9 linux-image-generic-lpae-hwe-22.04 5.19.0.32.33~22.04.9 linux-image-virtual-hwe-22.04 5.19.0.32.33~22.04.9 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-5879-1 CVE-2022-3619, CVE-2022-3628, CVE-2022-3640, CVE-2022-3643, CVE-2022-42895, CVE-2022-42896, CVE-2022-4378, CVE-2022-45934, CVE-2023-0590 Package Information: https://launchpad.net/ubuntu/+source/linux-hwe-5.19/5.19.0-32.33~22.04.1 . Numerous security flaws in the Linux kernel have been resolved in Ubuntu 22.04 LTS, necessitating prompt upgrades.. Linux Kernel Issues, Ubuntu Kernel Update, Software Update Recommendations. . Severity: Critical. LinuxSecurity.com Team
Feb 16, 2023
•Critical
Ubuntu
172
security advisoryDoSUbuntuUbuntu 14.04 LTS: USN-3848-2 Critical: Linux Kernel DoS Risks
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-3848-2 December 20, 2018 linux-lts-xenial, linux-aws vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3848-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. It was discovered that a double free existed in the AMD GPIO driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-18174) It was discovered that an integer overrun vulnerability existed in the POSIX timers implementation in the Linux kernel. A local attacker could use this to cause a denial of service. (CVE-2018-12896) Kanda Motohiro discovered that writing extended attributes to an XFS file system in the Linux kernel in certain situations could cause an error condition to occur. A local attacker could use this to cause a denial of service. (CVE-2018-18690) It was discovered that an integer overflow vulnerability existed in the CDROM driver of the Linux kernel. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2018-18710) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-1037-aws 4.4.0-1037.40 linux-image-4.4.0-141-generic 4.4.0-141.167~14.04.1 linux-image-4.4.0-141-generic-lpae 4.4.0-141.167~14.04.1 linux-image-4.4.0-141-lowlatency 4.4.0-141.167~14.04.1 linux-image-4.4.0-141-powerpc-e500mc 4.4.0-141.167~14.04.1 linux-image-4.4.0-141-powerpc-smp 4.4.0-141.167~14.04.1 linux-image-4.4.0-141-powerpc64-emb 4.4.0-141.167~14.04.1 linux-image-4.4.0-141-powerpc64-smp 4.4.0-141.167~14.04.1 linux-image-aws 4.4.0.1037.37 linux-image-generic-lpae-lts-xenial 4.4.0.141.121 linux-image-generic-lts-xenial 4.4.0.141.121 linux-image-lowlatency-lts-xenial 4.4.0.141.121 linux-image-powerpc-e500mc-lts-xenial 4.4.0.141.121 linux-image-powerpc-smp-lts-xenial 4.4.0.141.121 linux-image-powerpc64-emb-lts-xenial 4.4.0.141.121 linux-image-powerpc64-smp-lts-xenial 4.4.0.141.121 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-3848-2 https://ubuntu.com/security/notices/USN-3848-1 CVE-2017-18174, CVE-2018-12896, CVE-2018-18690, CVE-2018-18710 Package Information: https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1037.40 https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-141.167~14.04.1 . Ubuntu Security Notice USN-3848-2 December 20, 2018 linux-lts-xenial, linux-aws vulnerabilities A se. security, linux, kernel, ============================================. . Severity: Critical. LinuxSecurity.com Team
Dec 20, 2018
•Critical
Ubuntu
172
security advisorydenial of serviceubuntuUbuntu 12.04 ESM USN-3655-2 Severe: Linux Kernel Denial of Service
Several security issues were addressed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-3655-2 May 22, 2018 linux-lts-trusty vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 ESM Summary: Several security issues were addressed in the Linux kernel. Software Description: - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM Details: USN-3655-1 fixed vulnerabilities and added mitigations in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 ESM. Jann Horn and Ken Johnson discovered that microprocessors utilizing speculative execution of a memory read may allow unauthorized memory reads via a sidechannel attack. This flaw is known as Spectre Variant 4. A local attacker could use this to expose sensitive information, including kernel memory. (CVE-2018-3639) Jan H. Schönherr discovered that the Xen subsystem did not properly handle block IO merges correctly in some situations. An attacker in a guest vm could use this to cause a denial of service (host crash) or possibly gain administrative privileges in the host. (CVE-2017-12134) It was discovered that the Bluetooth HIP Protocol implementation in the Linux kernel did not properly validate HID connection setup information. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-13220) It was discovered that a buffer overread vulnerability existed in the keyring subsystem of the Linux kernel. A local attacker could possibly use this to expose sensitive information (kernel memory). (CVE-2017-13305) It was discovered that the netlink subsystem in the Linux kernel did not properly restrict observations of netlinkmessages to the appropriate net namespace. A local attacker could use this to expose sensitive information (kernel netlink traffic). (CVE-2017-17449) It was discovered that a race condition existed in the i8042 serial device driver implementation in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-18079) It was discovered that a race condition existed in the Device Mapper component of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2017-18203) It was discovered that a race condition existed in the OCFS2 file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2017-18204) It was discovered that an infinite loop could occur in the madvise(2) implementation in the Linux kernel in certain circumstances. A local attacker could use this to cause a denial of service (system hang). (CVE-2017-18208) Kefeng Wang discovered that a race condition existed in the memory locking implementation in the Linux kernel. A local attacker could use this to cause a denial of service. (CVE-2017-18221) Silvio Cesare discovered a buffer overwrite existed in the NCPFS implementation in the Linux kernel. A remote attacker controlling a malicious NCPFS server could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2018-8822) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: linux-image-3.13.0-149-generic 3.13.0-149.199~precise1 linux-image-3.13.0-149-generic-lpae 3.13.0-149.199~precise1 linux-image-generic-lpae-lts-trusty 3.13.0.149.140 linux-image-generic-lts-trusty 3.13.0.149.140 Please note that fully mitigating CVE-2018-3639 (Spectre Variant 4) may require corresponding processor microcode/firmware updates or, in virtualenvironments, hypervisor updates. On i386 and amd64 architectures, the SSBD feature is required to enable the kernel mitigations. BIOS vendors will be making updates available for Intel processors that implement SSBD. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines. References: https://ubuntu.com/security/notices/USN-3655-2 https://ubuntu.com/security/notices/USN-3655-1 CVE-2017-12134, CVE-2017-13220, CVE-2017-13305, CVE-2017-17449, CVE-2017-18079, CVE-2017-18203, CVE-2017-18204, CVE-2017-18208, CVE-2017-18221, CVE-2018-3639, CVE-2018-8822, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4 . Crucial revisions for Ubuntu's Linux core tackling various vulnerabilities impacting Trusty and Precise ESM.. Ubuntu Security Notice, Linux Kernel Security, Trusty HWE, Denial of Service Exploit. . Severity: Critical. LinuxSecurity.com Team
May 22, 2018
•Critical
Ubuntu
172
security advisorydenial of servicebuffer overflowUbuntu 14.04 LTS: 3405-2 Moderate: Kernel Denial Of Service Threat
Several security issues were fixed in the Linux kernel.. =========================================================================Ubuntu Security Notice USN-3405-2 August 28, 2017 linux-lts-xenial vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty Details: USN-3405-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu 14.04 LTS. It was discovered that a use-after-free vulnerability existed in the POSIX message queue implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-11176) Huang Weller discovered that the ext4 filesystem implementation in the Linux kernel mishandled a needs-flushing-before-commit list. A local attacker could use this to expose sensitive information. (CVE-2017-7495) It was discovered that a buffer overflow existed in the Broadcom FullMAC WLAN driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2017-7541) It was discovered that the Linux kernel did not honor the UEFI secure boot mode when performing a kexec operation. A local attacker could use this to bypass secure boot restrictions. (CVE-2015-7837) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-93-generic 4.4.0-93.116~14.04.1 linux-image-4.4.0-93-generic-lpae 4.4.0-93.116~14.04.1 linux-image-4.4.0-93-lowlatency 4.4.0-93.116~14.04.1 linux-image-4.4.0-93-powerpc-e500mc 4.4.0-93.116~14.04.1 linux-image-4.4.0-93-powerpc-smp 4.4.0-93.116~14.04.1 linux-image-4.4.0-93-powerpc64-emb 4.4.0-93.116~14.04.1 linux-image-4.4.0-93-powerpc64-smp 4.4.0-93.116~14.04.1 linux-image-generic-lpae-lts-xenial 4.4.0.93.77 linux-image-generic-lts-xenial 4.4.0.93.77 linux-image-lowlatency-lts-xenial 4.4.0.93.77 linux-image-powerpc-e500mc-lts-xenial 4.4.0.93.77 linux-image-powerpc-smp-lts-xenial 4.4.0.93.77 linux-image-powerpc64-emb-lts-xenial 4.4.0.93.77 linux-image-powerpc64-smp-lts-xenial 4.4.0.93.77 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-3405-2 https://ubuntu.com/security/notices/USN-3405-1 CVE-2015-7837, CVE-2017-11176, CVE-2017-7495, CVE-2017-7541 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-93.116~14.04.1 . Several vulnerabilities detected and resolved in Ubuntu's Linux core, necessitating prompt system upgrades for users.. Ubuntu Security Updates,Linux Kernel Issues,System Security,Security Patches. . LinuxSecurity.com Team
Aug 28, 2017
Ubuntu
172
security advisorydenial of servicecritical issueUbuntu 14.04 LTS: USN-2948-1 Critical: Kernel Denial Of Service Issues
Several security issues were fixed in the kernel.. =========================================================================Ubuntu Security Notice USN-2948-1 April 06, 2016 linux-lts-utopic vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-utopic: Linux hardware enablement kernel from Utopic for Trusty Details: Ralf Spenneberg discovered that the USB driver for Clie devices in the Linux kernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7566) Ralf Spenneberg discovered that the usbvision driver in the Linux kernel did not properly sanity check the interfaces and endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2015-7833) Venkatesh Pottem discovered a use-after-free vulnerability in the Linux kernel's CXGB3 driver. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2015-8812) It was discovered that a race condition existed in the ioctl handler for the TTY driver in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2016-0723) Xiaofei Rex Guo discovered a timing side channel vulnerability in the Linux Extended Verification Module (EVM). An attacker could use this to affect system integrity. (CVE-2016-2085) David Herrmann discovered that the Linux kernel incorrectly accounted file descriptors to the original opener for in-flight file descriptors sent over a unix domain socket. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2550) Ralf Spenneberg discovered that the USB driver for Treo devices in the Linuxkernel did not properly sanity check the endpoints reported by the device. An attacker with physical access could cause a denial of service (system crash). (CVE-2016-2782) It was discovered that the Linux kernel did not enforce limits on the amount of data allocated to buffer pipes. A local attacker could use this to cause a denial of service (resource exhaustion). (CVE-2016-2847) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-3.16.0-69-generic 3.16.0-69.89~14.04.1 linux-image-3.16.0-69-generic-lpae 3.16.0-69.89~14.04.1 linux-image-3.16.0-69-lowlatency 3.16.0-69.89~14.04.1 linux-image-3.16.0-69-powerpc-e500mc 3.16.0-69.89~14.04.1 linux-image-3.16.0-69-powerpc-smp 3.16.0-69.89~14.04.1 linux-image-3.16.0-69-powerpc64-emb 3.16.0-69.89~14.04.1 linux-image-3.16.0-69-powerpc64-smp 3.16.0-69.89~14.04.1 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-2948-1 CVE-2015-7566, CVE-2015-7833, CVE-2015-8812, CVE-2016-0723, CVE-2016-2085, CVE-2016-2550, CVE-2016-2782, CVE-2016-2847 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-69.89~14.04.1 . Many vulnerabilities in the Ubuntu Linux kernel have been addressed. Guidance on necessary updates and precautions provided for secure usage.. Linux Kernel Security, Ubuntu Update, Denial of Service Fixes. . Severity: Critical. LinuxSecurity.com Team
Apr 06, 2016
•Critical
Ubuntu
172
security advisorydenial of serviceaccess controlUbuntu 14.04 LTS USN-2777-1 moderate: Linux Kernel DoS Threats
Several security issues were fixed in the kernel.. =========================================================================Ubuntu Security Notice USN-2777-1 October 20, 2015 linux-lts-utopic vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux-lts-utopic: Linux hardware enablement kernel from Utopic Details: It was discovered that virtio networking in the Linux kernel did not handle fragments correctly, leading to kernel memory corruption. A remote attacker could use this to cause a denial of service (system crash) or possibly execute code with administrative privileges. (CVE-2015-5156) Benjamin Randazzo discovered an information leak in the md (multiple device) driver when the bitmap_info.file is disabled. A local privileged attacker could use this to obtain sensitive information from the kernel. (CVE-2015-5697) Marc-André Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). (CVE-2015-6252) It was discovered that the Reliable Datagram Sockets (RDS) implementation in the Linux kernel did not verify sockets were properly bound before attempting to send a message, which could cause a NULL pointer dereference. An attacker could use this to cause a denial of service (system crash). (CVE-2015-6937) Ben Hutchings discovered that the Advanced Union Filesystem (aufs) for the Linux kernel did not correctly handle references of memory mapped files from an aufs mount. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2015-7312) Update instructions: The problem can be corrected by updating your system to thefollowing package versions: Ubuntu 14.04 LTS: linux-image-3.16.0-51-generic 3.16.0-51.69~14.04.1 linux-image-3.16.0-51-generic-lpae 3.16.0-51.69~14.04.1 linux-image-3.16.0-51-lowlatency 3.16.0-51.69~14.04.1 linux-image-3.16.0-51-powerpc-e500mc 3.16.0-51.69~14.04.1 linux-image-3.16.0-51-powerpc-smp 3.16.0-51.69~14.04.1 linux-image-3.16.0-51-powerpc64-emb 3.16.0-51.69~14.04.1 linux-image-3.16.0-51-powerpc64-smp 3.16.0-51.69~14.04.1 After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-2777-1 CVE-2015-5156, CVE-2015-5697, CVE-2015-6252, CVE-2015-6937, CVE-2015-7312 Package Information: https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1 . =========================================================================Ubuntu Security Notice USN-. security, kernel, ==================================================. . Severity: Important. LinuxSecurity.com Team
Oct 20, 2015
•Important
Ubuntu
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