CVE-2023-6507
Groups not dropped before running subprocess when using empty 'extra_groups' parameter
Description
An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases. When using the `extra_groups=` parameter with an empty list as a value (ie `extra_groups=[]`) the logic regressed to not call `setgroups(0, NULL)` before calling `exec()`, thus not dropping the original processes' groups before starting the new process. There is no issue when the parameter isn't used or when any value is used besides an empty list. This issue only impacts CPython processes run with sufficient privilege to make the `setgroups` system call (typically `root`).
How to fix CVE-2023-6507
To remediate CVE-2023-6507, upgrade the affected package to a fixed version below.
- —upgrade to 3.12.1 or later
- —upgrade to 3.12.1 or later
- —upgrade to 3.12.1 or later
Is CVE-2023-6507 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- >= 3.12.0, < 3.12.1
- >= 3.12.0, < 3.12.1
- >= 3.12.0, < 3.12.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.9 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N |