Vulnerability Description
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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linuxcontainers | Lxc | <= 5.0.1 |
Related Weaknesses (CWE)
References
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591/comments/45Issue TrackingVendor Advisory
- https://github.com/MaherAzzouzi/CVE-2022-47952Third Party Advisory
- https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/lxc.speThird Party Advisory
- https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/src/lxcThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/08/msg00025.html
- https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591/comments/45Issue TrackingVendor Advisory
- https://github.com/MaherAzzouzi/CVE-2022-47952Third Party Advisory
- https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/lxc.speThird Party Advisory
- https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/src/lxcThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2023/08/msg00025.html
FAQ
What is CVE-2022-47952?
CVE-2022-47952 is a vulnerability with a CVSS score of 3.3 (LOW). 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...
How severe is CVE-2022-47952?
CVE-2022-47952 has been rated LOW with a CVSS base score of 3.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-47952?
Check the references section above for vendor advisories and patch information. Affected products include: Linuxcontainers Lxc.