CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
25.6%
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
).
github.com/python/cpython/commit/10e9bb13b8dcaa414645b9bd10718d8f7179e82b
github.com/python/cpython/commit/85bbfa8a4bbdbb61a3a84fbd7cb29a4096ab8a06
github.com/python/cpython/commit/9fe7655c6ce0b8e9adc229daf681b6d30e6b1610
github.com/python/cpython/issues/112334
mail.python.org/archives/list/[email protected]/thread/AUL7QFHBLILGISS7U63B47AYSSGJJQZD/
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
AI Score
Confidence
High
EPSS
Percentile
25.6%