CVE-2023-1076
- State
- Published
- Severity
- 5.5 Medium
- Published
- Mar 27, 2023
- Updated
- Feb 24, 2025
- Reserved
- Feb 27, 2023
Description
A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N | CISA-ADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Linux kerneln/a |
|
References
- https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=66b2c338adce580dfce2199591e65e2bab889cff
- https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a096ccca6e503a5c575717ff8a36ace27510ab0a
- [debian-lts-announce] 20230502 [SECURITY] [DLA 3404-1] linux-5.10 security updatemailing-list
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