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
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Canonical Ltd. / snapdunspecified – 2.54.2
References
- VENDOR_ADVISORYhttps://ubuntu.com/security/notices/USN-5292-1
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2022/02/18/2
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
- MAILING_LISThttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
- VENDOR_ADVISORYhttps://www.debian.org/security/2022/dsa-5080
- MAILING_LISThttp://www.openwall.com/lists/oss-security/2022/02/23/1