Improper input validation in Canonical Ltd. Snapd
CVE-2021-4120
snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.004 (35.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Canonical Ltd. Snapd — versions unspecified
- Canonical Snapd
- Canonical Ubuntu_linux — versions 18.04, 20.04, 21.10
- Fedoraproject Fedora — versions 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@ubuntu.com (Patch, x_refsource_MISC, Vendor Advisory)
- security@ubuntu.com (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Exploit, Mailing List, Third Party Advisory)
- security@ubuntu.com (x_refsource_FEDORA, vendor-advisory)
- security@ubuntu.com (x_refsource_FEDORA, vendor-advisory)
Frequently asked questions
- What is CVE-2021-4120?
- CVE-2021-4120 is a high-severity vulnerability in Canonical Ltd. Snapd, classified under Improper Input Validation. CVSS score: 8.2/10. Published 2022-02-17.
- How severe is CVE-2021-4120?
- High severity. CVSS v3 base score is 8.2 out of 10.
- Is CVE-2021-4120 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.