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.
References
Link | Resource |
---|---|
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1783591/comments/45 | Issue Tracking Vendor Advisory |
https://github.com/MaherAzzouzi/CVE-2022-47952 | Third Party Advisory |
https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/lxc.spec.in#L274 | Third Party Advisory |
https://github.com/lxc/lxc/blob/0b83d71c2c8f3bac9503f894cd84584f79258bb3/src/lxc/cmd/lxc_user_nic.c#L1085-L1104 | Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2023/08/msg00025.html |
Configurations
History
21 Aug 2023, 23:15
Type | Values Removed | Values Added |
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References |
|
08 Aug 2023, 14:22
Type | Values Removed | Values Added |
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CWE | CWE-203 |
Information
Published : 2023-01-01 06:15
Updated : 2024-02-28 19:51
NVD link : CVE-2022-47952
Mitre link : CVE-2022-47952
CVE.ORG link : CVE-2022-47952
JSON object : View
Products Affected
linuxcontainers
- lxc
CWE
CWE-203
Observable Discrepancy