Vulnerability in Linuxcontainers Lxc
CVE-2022-47952
lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exists, even within a protected directory tree, because "Failed to open" often indicates that a file does not exist, whereas "does not refer to a network namespace path" often indicates that a file exists. NOTE: this is different from CVE-2018-6556 because the CVE-2018-6556 fix design was based on the premise that "we will report back to the user that the open() failed but the user has no way of knowing why it failed"; however, in many realistic cases, there are no plausible reasons for failing except that the file does not exist.
EPSS: 0.007 (50.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Linuxcontainers Lxc
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Issue Tracking, Vendor Advisory)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (mailing-list)
Frequently asked questions
- What is CVE-2022-47952?
- CVE-2022-47952 is a low-severity vulnerability in Linuxcontainers Lxc, classified under Observable Discrepancy. CVSS score: 3.3/10. Published 2023-01-01.
- How severe is CVE-2022-47952?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2022-47952 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.