https://bugzilla.mindrot.org/show_bug.cgi?id=3735
Bug ID: 3735
Summary: The ngroups variable may be set to a negative value
when calling sysconf(_SC_NGROUPS_MAX)
Product: Portable OpenSSH
Version: 9.8p1
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: P5
Component: Build system
Assignee: [email protected]
Reporter: [email protected]
File:
https://github.com/openssh/openssh-portable/blob/master/groupaccess.c
Line: 64
The ngroups variable can be set to a negative value when calling
sysconf(_SC_NGROUPS_MAX), and this value is then used without checking
in the xcalloc function call, which can lead to unpredictable behavior
or even errors.
A check must be added to ensure that the value returned by sysconf is
not negative.
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