Vulnerability in Canonical Ltd. Snapd
CVE-2021-44730
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…
EPSS: 0.004 (27.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/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
- Debian Debian_linux — versions 10.0, 11.0
- 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 (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@ubuntu.com (x_refsource_FEDORA, vendor-advisory)
- security@ubuntu.com (x_refsource_FEDORA, vendor-advisory)
- security@ubuntu.com (vendor-advisory, Third Party Advisory, Issue Tracking, x_refsource_DEBIAN)
- security@ubuntu.com (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-44730?
- CVE-2021-44730 is a high-severity vulnerability in Canonical Ltd. Snapd, classified under Improper Link Resolution Before File Access. CVSS score: 7.8/10. Published 2022-02-17.
- How severe is CVE-2021-44730?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-44730 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.