==========================================================================
Ubuntu Security Notice USN-6725-2
April 16, 2024

linux-aws, linux-aws-5.15 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-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

Details:

Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate certain data structure fields when parsing lease
contexts, 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-2023-1194)

Quentin Minster discovered that a race condition existed in the KSMBD
implementation in the Linux kernel, leading to a use-after-free
vulnerability. A remote attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2023-32254)

It was discovered that a race condition existed in the KSMBD implementation
in the Linux kernel when handling session connections, leading to a use-
after-free vulnerability. A remote attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2023-32258)

It was discovered that the KSMBD implementation in the Linux kernel did not
properly validate buffer sizes in certain operations, leading to an integer
underflow and 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-2023-38427)

Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate SMB request protocol IDs, leading to a out-of-
bounds read vulnerability. A remote attacker could possibly use this to
cause a denial of service (system crash). (CVE-2023-38430)

Chih-Yen Chang discovered that the KSMBD implementation in the Linux kernel
did not properly validate packet header sizes in certain situations,
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-2023-38431)

It was discovered that the KSMBD implementation in the Linux kernel did not
properly handle session setup requests, leading to an out-of-bounds read
vulnerability. A remote attacker could use this to expose sensitive
information. (CVE-2023-3867)

Pratyush Yadav discovered that the Xen network backend implementation in
the Linux kernel did not properly handle zero length data request, leading
to a null pointer dereference vulnerability. An attacker in a guest VM
could possibly use this to cause a denial of service (host domain crash).
(CVE-2023-46838)

It was discovered that the IPv6 implementation of the Linux kernel did not
properly manage route cache memory usage. A remote attacker could use this
to cause a denial of service (memory exhaustion). (CVE-2023-52340)

It was discovered that the device mapper driver in the Linux kernel did not
properly validate target size during certain memory allocations. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2023-52429, CVE-2024-23851)

Yang Chaoming discovered that the KSMBD implementation in the Linux kernel
did not properly validate request buffer sizes, leading to an out-of-bounds
read vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2024-22705)

Chenyuan Yang discovered that the btrfs file system in the Linux kernel did
not properly handle read operations on newly created subvolumes in certain
conditions. A local attacker could use this to cause a denial of service
(system crash). (CVE-2024-23850)

It was discovered that a race condition existed in the Bluetooth subsystem
in the Linux kernel, leading to a null pointer dereference vulnerability. A
privileged local attacker could use this to possibly cause a denial of
service (system crash). (CVE-2024-24860)

Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
   - Architecture specifics;
   - Block layer;
   - Cryptographic API;
   - Android drivers;
   - EDAC drivers;
   - GPU drivers;
   - Media drivers;
   - Multifunction device drivers;
   - MTD block device drivers;
   - Network drivers;
   - NVME drivers;
   - TTY drivers;
   - Userspace I/O drivers;
   - EFI Variable file system;
   - F2FS file system;
   - GFS2 file system;
   - SMB network file system;
   - BPF subsystem;
   - IPv6 Networking;
   - Network Traffic Control;
   - AppArmor security module;
(CVE-2023-52463, CVE-2023-52445, CVE-2023-52462, CVE-2023-52609,
CVE-2023-52448, CVE-2023-52457, CVE-2023-52464, CVE-2023-52456,
CVE-2023-52454, CVE-2023-52438, CVE-2023-52480, CVE-2023-52443,
CVE-2023-52442, CVE-2024-26631, CVE-2023-52439, CVE-2023-52612,
CVE-2024-26598, CVE-2024-26586, CVE-2024-26589, CVE-2023-52444,
CVE-2023-52436, CVE-2024-26633, CVE-2024-26597, CVE-2023-52458,
CVE-2024-26591, CVE-2023-52449, CVE-2023-52467, CVE-2023-52441,
CVE-2023-52610, CVE-2023-52451, CVE-2023-52469, CVE-2023-52470)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1057-aws     5.15.0-1057.63
   linux-image-aws-lts-22.04       5.15.0.1057.58

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1057-aws     5.15.0-1057.63~20.04.1
   linux-image-aws                 5.15.0.1057.63~20.04.1

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-6725-2
   https://ubuntu.com/security/notices/USN-6725-1
   CVE-2023-1194, CVE-2023-32254, CVE-2023-32258, CVE-2023-38427,
   CVE-2023-38430, CVE-2023-38431, CVE-2023-3867, CVE-2023-46838,
   CVE-2023-52340, CVE-2023-52429, CVE-2023-52436, CVE-2023-52438,
   CVE-2023-52439, CVE-2023-52441, CVE-2023-52442, CVE-2023-52443,
   CVE-2023-52444, CVE-2023-52445, CVE-2023-52448, CVE-2023-52449,
   CVE-2023-52451, CVE-2023-52454, CVE-2023-52456, CVE-2023-52457,
   CVE-2023-52458, CVE-2023-52462, CVE-2023-52463, CVE-2023-52464,
   CVE-2023-52467, CVE-2023-52469, CVE-2023-52470, CVE-2023-52480,
   CVE-2023-52609, CVE-2023-52610, CVE-2023-52612, CVE-2024-22705,
   CVE-2024-23850, CVE-2024-23851, CVE-2024-24860, CVE-2024-26586,
   CVE-2024-26589, CVE-2024-26591, CVE-2024-26597, CVE-2024-26598,
   CVE-2024-26631, CVE-2024-26633

Package Information:
   https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1057.63
   https://launchpad.net/ubuntu/+source/linux-aws-5.15/5.15.0-1057.63~20.04.1