REDHAT-BUG-1655925
First published: Tue Dec 04 2018(Updated: )
It was found that creating a user of group above INT32_MAX would wrap around the numeric uid or gid. Polkit is not able to handle this properly, resulting in an authentication bypass. References: <a href="https://seclists.org/oss-sec/2018/q4/198">https://seclists.org/oss-sec/2018/q4/198</a> Upstream issue: <a href="https://gitlab.freedesktop.org/polkit/polkit/issues/74">https://gitlab.freedesktop.org/polkit/polkit/issues/74</a> Proposed patch: <a href="https://gitlab.freedesktop.org/zbyszek/polkit/commit/fbaab32cb4ed9ed5f1e3eea6cd317d443aa427dc">https://gitlab.freedesktop.org/zbyszek/polkit/commit/fbaab32cb4ed9ed5f1e3eea6cd317d443aa427dc</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Polkit |
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Reference Links
- https://seclists.org/oss-sec/2018/q4/198
- https://gitlab.freedesktop.org/polkit/polkit/issues/74
- https://gitlab.freedesktop.org/zbyszek/polkit/commit/fbaab32cb4ed9ed5f1e3eea6cd317d443aa427dc
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1655926
- https://gitlab.freedesktop.org/zbyszek/polkit/commit/7c8c3abdedbb991a69bc5f1ab0f96576958b55de
- https://access.redhat.com/support/policy/updates/errata/
- https://access.redhat.com/errata/RHSA-2019:2046
- https://access.redhat.com/security/cve/cve-2018-19788
- https://access.redhat.com/errata/RHSA-2019:3232
- https://bugzilla.redhat.com/show_bug.cgi?id=1655925
Frequently Asked Questions
What is the severity of REDHAT-BUG-1655925?
The severity of REDHAT-BUG-1655925 is considered high due to the potential for an authentication bypass.
How does REDHAT-BUG-1655925 affect Polkit?
REDHAT-BUG-1655925 affects Polkit by allowing user creation with group IDs above INT32_MAX, leading to numeric wraparound and improper handling.
What systems are impacted by REDHAT-BUG-1655925?
REDHAT-BUG-1655925 impacts systems using Polkit for user authentication management.
How do I fix REDHAT-BUG-1655925?
To fix REDHAT-BUG-1655925, update Polkit to the latest patched version that resolves the user and group ID handling issue.
What should I do if I'm affected by REDHAT-BUG-1655925?
If affected by REDHAT-BUG-1655925, it's essential to apply the relevant security updates and monitor for any unusual authentication behavior.
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