[USN-5291-1] libarchive vulnerabilities

========================================================================== Ubuntu Security Notice USN-5291-1 February 17, 2022
libarchive vulnerabilities ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in libarchive.
Software Description: – libarchive: Library to read/write archive files
Details:
It was discovered that libarchive incorrectly handled symlinks. If a user or automated system were tricked into processing a specially crafted archive, an attacker could possibly use this issue to change modes, times, ACLs, and flags on arbitrary files. (CVE-2021-23177, CVE-2021-31566)
It was discovered that libarchive incorrectly handled certain RAR archives. If a user or automated system were tricked into processing a specially crafted RAR archive, an attacker could use this issue to cause libarchive to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-36976)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: libarchive13 3.4.3-2ubuntu0.1
Ubuntu 20.04 LTS: libarchive13 3.4.0-2ubuntu1.1
In general, a standard system update will make all the necessary changes.
References: ubuntu.com/security/notices/USN-5291-1 CVE-2021-23177, CVE-2021-31566, CVE-2021-36976
Package Information: launchpad.net/ubuntu/+source/libarchive/3.4.3-2ubuntu0.1 launchpad.net/ubuntu/+source/libarchive/3.4.0-2ubuntu1.1