[USN-5759-1] LibBPF vulnerabilities

[Nishit Majithia]

==========================================================================
Ubuntu Security Notice USN-5759-1
December 05, 2022

libbpf vulnerabilities
==========================================================================

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

- Ubuntu 22.10
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in LibBPF.

Software Description:
- libbpf: eBPF helper library (development files)

Details:

It was discovered that LibBPF incorrectly handled certain memory operations
under certain circumstances. An attacker could possibly use this issue to
cause LibBPF to crash, resulting in a denial of service, or possibly
execute arbitrary code. This issue only affected Ubuntu 22.10.
(CVE-2021-45940, CVE-2021-45941, CVE-2022-3533)

It was discovered that LibBPF incorrectly handled certain memory operations
under certain circumstances. An attacker could possibly use this issue to
cause LibBPF to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2022-3534, CVE-2022-3606)

Update instructions:

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

Ubuntu 22.10:
  libbpf-dev                      1:0.8.0-1ubuntu22.10.1

Ubuntu 22.04 LTS:
  libbpf-dev                      1:0.5.0-1ubuntu22.04.1

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5759-1
  CVE-2021-45940, CVE-2021-45941, CVE-2022-3533, CVE-2022-3534,
  CVE-2022-3606

Package Information:
  https://launchpad.net/ubuntu/+source/libbpf/0.8.0-1ubuntu22.10.1
  https://launchpad.net/ubuntu/+source/libbpf/0.5.0-1ubuntu22.04.1
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