Description
snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Canonical Ltd. snapd
unspecified to ≤ 2.54.2affected
References
- https://ubuntu.com/security/notices/USN-5292-1 ↗
- http://www.openwall.com/lists/oss-security/2022/02/18/2 ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ ↗
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ ↗
- https://www.debian.org/security/2022/dsa-5080 ↗
- http://www.openwall.com/lists/oss-security/2022/02/23/1 ↗