==========================================================================
Ubuntu Security Notice USN-6341-1
September 06, 2023

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

- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

Jordy Zomer and Alexandra Sandulescu discovered that syscalls invoking the
do_prlimit() function in the Linux kernel did not properly handle
speculative execution barriers. A local attacker could use this to expose
sensitive information (kernel memory). (CVE-2023-0458)

It was discovered that a use-after-free vulnerability existed in the IEEE
1394 (Firewire) implementation in the Linux kernel. A privileged attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-3159)

It was discovered that the virtual terminal driver 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 expose sensitive
information (kernel memory). (CVE-2023-3567)

It was discovered that the Quick Fair Queueing network scheduler
implementation in the Linux kernel contained an out-of-bounds write
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-3611)

It was discovered that the network packet classifier with
netfilter/firewall marks implementation in the Linux kernel did not
properly handle reference counting, 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-2023-3776)

Update instructions:

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

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-3.13.0-193-generic  3.13.0-193.244
   linux-image-3.13.0-193-lowlatency  3.13.0-193.244
   linux-image-generic             3.13.0.193.203
   linux-image-generic-lts-trusty  3.13.0.193.203
   linux-image-lowlatency          3.13.0.193.203
   linux-image-server              3.13.0.193.203
   linux-image-virtual             3.13.0.193.203

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-6341-1
   CVE-2023-0458, CVE-2023-3159, CVE-2023-3567, CVE-2023-3611,
   CVE-2023-3776

Ubuntu 6341-1: Linux kernel vulnerabilities

September 6, 2023
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel Details: Jordy Zomer and Alexandra Sandulescu discovered that syscalls invoking the do_prlimit() function in the Linux kernel did not properly handle speculative execution barriers. A local attacker could use this to expose sensitive information (kernel memory). (CVE-2023-0458) It was discovered that a use-after-free vulnerability existed in the IEEE 1394 (Firewire) implementation in the Linux kernel. A privileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3159) It was discovered that the virtual terminal driver 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 expose sensitive information (kernel memory). (CVE-2023-3567) It was discovered that the Quick Fair Queueing network scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-3611) It was discovered that the network packet classifier with netfilter/firewall marks implementation in the Linux kernel did not properly handle reference counting, 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-2023-3776)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS (Available with Ubuntu Pro): linux-image-3.13.0-193-generic 3.13.0-193.244 linux-image-3.13.0-193-lowlatency 3.13.0-193.244 linux-image-generic 3.13.0.193.203 linux-image-generic-lts-trusty 3.13.0.193.203 linux-image-lowlatency 3.13.0.193.203 linux-image-server 3.13.0.193.203 linux-image-virtual 3.13.0.193.203 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-6341-1

CVE-2023-0458, CVE-2023-3159, CVE-2023-3567, CVE-2023-3611,

CVE-2023-3776

Severity
Ubuntu Security Notice USN-6341-1

Package Information

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