REDHAT-BUG-1533836
First published: Fri Jan 12 2018(Updated: )
A buffer underflow in realpath() in glibc when getcwd() returns relative path or unreachable path (i.e. not starting with '/') was found that can allow privilege escalation under certain conditions. Reference: <a href="http://www.openwall.com/lists/oss-security/2018/01/11/5">http://www.openwall.com/lists/oss-security/2018/01/11/5</a>
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU C Library |
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Reference Links
- http://www.openwall.com/lists/oss-security/2018/01/11/5
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533837
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533840
- https://lists.gluster.org/pipermail/gluster-users/2018-January/033293.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533836#c7
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1542180
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533836#c12
- https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html-single/7.4_release_notes/index#technology_previews_kernel
- https://access.redhat.com/security/cve/cve-2018-1000001
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533836#c14
- https://access.redhat.com/solutions/21101
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1533836#c17
- https://access.redhat.com/errata/RHSA-2018:0805
- https://bugzilla.redhat.com/show_bug.cgi?id=1533836
Frequently Asked Questions
What is the severity of REDHAT-BUG-1533836?
The severity of REDHAT-BUG-1533836 is considered critical due to its potential for privilege escalation.
How do I fix REDHAT-BUG-1533836?
To fix REDHAT-BUG-1533836, you should update the GNU C Library (glibc) to the latest patched version available.
What causes REDHAT-BUG-1533836?
REDHAT-BUG-1533836 is caused by a buffer underflow in the realpath() function when getcwd() returns specific types of paths.
Who is affected by REDHAT-BUG-1533836?
Users of GNU glibc are primarily affected by REDHAT-BUG-1533836, especially in environments where relative paths are used.
Can I exploit REDHAT-BUG-1533836?
Yes, under certain conditions, REDHAT-BUG-1533836 can be exploited to gain elevated privileges on vulnerable systems.
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