[USN-5291-1] libarchive vulnerabilities
marc.deslauriers at canonical.com
Thu Feb 17 15:02:10 UTC 2022
Ubuntu Security Notice USN-5291-1
February 17, 2022
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 21.10
- Ubuntu 20.04 LTS
Several security issues were fixed in libarchive.
- libarchive: Library to read/write archive files
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
The problem can be corrected by updating your system to the following
Ubuntu 20.04 LTS:
In general, a standard system update will make all the necessary changes.
CVE-2021-23177, CVE-2021-31566, CVE-2021-36976
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