==========================================================================
Ubuntu Security Notice USN-5602-1
September 08, 2022

linux-raspi 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-raspi: Linux kernel for Raspberry Pi systems

Details:

Asaf Modelevsky discovered that the Intel(R) 10GbE PCI Express (ixgbe)
Ethernet driver for the Linux kernel performed insufficient control flow
management. A local attacker could possibly use this to cause a denial 
of service. (CVE-2021-33061)

It was discovered that the IP implementation in the Linux kernel did not
provide sufficient randomization when calculating port offsets. An 
attacker could possibly use this to expose sensitive information. 
(CVE-2022-1012)

Norbert Slusarek discovered that a race condition existed in the perf
subsystem in the Linux kernel, resulting in a use-after-free 
vulnerability. A privileged local attacker could use this to cause a 
denial of service (system crash) or possibly execute arbitrary code. 
(CVE-2022-1729)

Qiuhao Li, Gaoning Pan, and Yongkang Jia discovered that the KVM 
hypervisor implementation in the Linux kernel did not properly handle an 
illegal instruction in a guest, resulting in a null pointer dereference. 
An attacker in a guest VM could use this to cause a denial of service 
(system crash) in the host OS. (CVE-2022-1852)

It was discovered that the UDF file system 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-2022-1943)

Gerald Lee discovered that the NTFS file system implementation in the 
Linux kernel did not properly handle certain error conditions, leading 
to a use-after-free vulnerability. A local attacker could use this to 
cause a denial of service (system crash) or possibly expose sensitive 
information. (CVE-2022-1973)

It was discovered that the device-mapper verity (dm-verity) driver in 
the Linux kernel did not properly verify targets being loaded into the 
device-mapper table. A privileged attacker could use this to cause a 
denial of service (system crash) or possibly execute arbitrary code. 
(CVE-2022-2503)

Zheyu Ma discovered that the Intel iSMT SMBus host controller driver 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).
(CVE-2022-2873)

Selim Enes Karaduman discovered that a race condition existed in the 
pipe buffers implementation of the Linux kernel. A local attacker could 
use this to cause a denial of service (system crash) or possibly 
escalate privileges. (CVE-2022-2959)

Update instructions:

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1014-raspi   5.15.0-1014.16
   linux-image-5.15.0-1014-raspi-nolpae  5.15.0-1014.16
   linux-image-raspi               5.15.0.1014.13
   linux-image-raspi-nolpae        5.15.0.1014.13

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-5602-1
   CVE-2021-33061, CVE-2022-1012, CVE-2022-1729, CVE-2022-1852,
   CVE-2022-1943, CVE-2022-1973, CVE-2022-2503, CVE-2022-2873,
   CVE-2022-2959

Package Information:
   https://launchpad.net/ubuntu/+source/linux-raspi/5.15.0-1014.16