==========================================================================
Ubuntu Security Notice USN-6339-3
September 11, 2023

linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15,
linux-raspi vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems
- linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems

Details:

It was discovered that the NTFS file system implementation in the Linux
kernel did not properly validate MFT flags in certain situations. An
attacker could use this to construct a malicious NTFS image that, when
mounted and operated on, could cause a denial of service (system crash).
(CVE-2022-48425)

Zi Fan Tan discovered that the binder IPC implementation in the Linux
kernel contained 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-2023-21255)

It was discovered that a race condition existed in the f2fs file system in
the Linux kernel, leading to a null pointer dereference vulnerability. An
attacker could use this to construct a malicious f2fs image that, when
mounted and operated on, could cause a denial of service (system crash).
(CVE-2023-2898)

It was discovered that the DVB Core driver in the Linux kernel did not
properly handle locking events in certain situations. A local attacker
could use this to cause a denial of service (kernel deadlock).
(CVE-2023-31084)

Yang Lan discovered that the GFS2 file system implementation in the Linux
kernel could attempt to dereference a null pointer in some situations. An
attacker could use this to construct a malicious GFS2 image that, when
mounted and operated on, could cause a denial of service (system crash).
(CVE-2023-3212)

It was discovered that the KSMBD implementation in the Linux kernel did not
properly validate buffer sizes in certain operations, leading to an out-of-
bounds read vulnerability. A remote attacker could use this to cause a
denial of service (system crash) or possibly expose sensitive information.
(CVE-2023-38426, CVE-2023-38428)

It was discovered that the KSMBD implementation in the Linux kernel did not
properly calculate the size of certain buffers. A remote attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2023-38429)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1037-raspi   5.15.0-1037.40
   linux-image-5.15.0-1046-azure   5.15.0-1046.53
   linux-image-5.15.0-1046-azure-fde  5.15.0-1046.53.1
   linux-image-azure-fde-lts-22.04  5.15.0.1046.53.24
   linux-image-azure-lts-22.04     5.15.0.1046.42
   linux-image-raspi               5.15.0.1037.35
   linux-image-raspi-nolpae        5.15.0.1037.35

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1046-azure   5.15.0-1046.53~20.04.1
   linux-image-5.15.0-1046-azure-fde  5.15.0-1046.53~20.04.1.1
   linux-image-azure               5.15.0.1046.53~20.04.35
   linux-image-azure-cvm           5.15.0.1046.53~20.04.35
   linux-image-azure-fde           5.15.0.1046.53~20.04.1.24

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-6339-3
   https://ubuntu.com/security/notices/USN-6339-1
   CVE-2022-48425, CVE-2023-21255, CVE-2023-2898, CVE-2023-31084,
   CVE-2023-3212, CVE-2023-38426, CVE-2023-38428, CVE-2023-38429

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1046.53
   https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1046.53.1
   https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1037.40
   https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1046.53~20.04.1
 
https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1046.53~20.04.1.1

Ubuntu 6339-3: Linux kernel vulnerabilities

September 11, 2023
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems - linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems Details: It was discovered that the NTFS file system implementation in the Linux kernel did not properly validate MFT flags in certain situations. An attacker could use this to construct a malicious NTFS image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2022-48425) Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained 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-2023-21255) It was discovered that a race condition existed in the f2fs file system in the Linux kernel, leading to a null pointer dereference vulnerability. An attacker could use this to construct a malicious f2fs image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-2898) It was discovered that the DVB Core driver in the Linux kernel did not properly handle locking events in certain situations. A local attacker could use this to cause a denial of service (kernel deadlock). (CVE-2023-31084) Yang Lan discovered that the GFS2 file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious GFS2 image that, when mounted and operated on, could cause a denial of service (system crash). (CVE-2023-3212) It was discovered that the KSMBD implementation in the Linux kernel did not properly validate buffer sizes in certain operations, leading to an out-of- bounds read vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2023-38426, CVE-2023-38428) It was discovered that the KSMBD implementation in the Linux kernel did not properly calculate the size of certain buffers. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-38429)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1037-raspi 5.15.0-1037.40 linux-image-5.15.0-1046-azure 5.15.0-1046.53 linux-image-5.15.0-1046-azure-fde 5.15.0-1046.53.1 linux-image-azure-fde-lts-22.04 5.15.0.1046.53.24 linux-image-azure-lts-22.04 5.15.0.1046.42 linux-image-raspi 5.15.0.1037.35 linux-image-raspi-nolpae 5.15.0.1037.35 Ubuntu 20.04 LTS: linux-image-5.15.0-1046-azure 5.15.0-1046.53~20.04.1 linux-image-5.15.0-1046-azure-fde 5.15.0-1046.53~20.04.1.1 linux-image-azure 5.15.0.1046.53~20.04.35 linux-image-azure-cvm 5.15.0.1046.53~20.04.35 linux-image-azure-fde 5.15.0.1046.53~20.04.1.24 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-6339-3

https://ubuntu.com/security/notices/USN-6339-1

CVE-2022-48425, CVE-2023-21255, CVE-2023-2898, CVE-2023-31084,

CVE-2023-3212, CVE-2023-38426, CVE-2023-38428, CVE-2023-38429

Severity
Ubuntu Security Notice USN-6339-3

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1046.53 https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1046.53.1 https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1037.40 https://launchpad.net/ubuntu/+source/linux-azure-5.15/5.15.0-1046.53~20.04.1 https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1046.53~20.04.1.1

Related News

Fighting Back Against Hadooken Malware by Strengthening WebLogic Security
2 - 4 min read
Cybercriminals have been relentlessly attacking the digital landscape, aiming to exploit vulnerabilities in well-known systems. One such exploit is
CISA Sounds Alarm on Newly Exploited Vulnerabilities: Is Your System at Risk?
3 - 5 min read
CISA regularly publishes updates regarding vulnerabilities that present severe threats to global cybersecurity. Recently, CISA added three
Navigating the Linux Kernel
2 - 4 min read
The Linux operating system, widely acclaimed for its robustness and security , recently received widespread media attention due to a significant
Defending Against Remote Code Execution in Google Chrome: A Critical Update
2 - 3 min read
Google Chrome, a widely used web browser, serves millions of internet users by connecting them to the online world. Unfortunately, severe
Staying a Step Ahead of Adversaries: Mitigating Chromium
2 - 4 min read
Google Chrome, one of the world's most widely used web browsers, has recently been scrutinized due to the discovery of multiple Chromium
Unmasking Cicada3301: Examining the Threat of the New Rust-Based Ransomware
2 - 4 min read
Ransomware has long been a severe threat to organizations and admins alike. Recently, cybersecurity researchers discovered a new variant called
Buffer Overflow Exploits in Linux: Origins, Impact, and Countermeasures
3 - 6 min read
Buffer overflow vulnerabilities have long been one of the biggest headaches in computer security, especially on Linux operating systems that power
8 Expert-Recommended Security Practices to Fortify Your Linux Systems
4 - 8 min read
As a Linux admin or an infosec professional, you understand how the security landscape changes due to evolving threats, newly discovered

Get the Latest News & Insights

Sign up to get the latest security news affecting Linux and open source delivered straight to your inbox.

© 2024 Guardian Digital, Inc All Rights Reserved