CVE-2013-1418: Null Pointer Dereference
First published: Tue Nov 05 2013(Updated: )
It was reported [1] that if a KDC serves multiple realms, certain requests could cause the setup_server_realm() funtion to dereference a null pointer, resulting in a crash of the KDC (Key Distribution Center). This can be triggered by an unauthenticated user. This has been correct in git [2]. [1] <a href="http://mailman.mit.edu/pipermail/krb5-bugs/2013-November/010206.html">http://mailman.mit.edu/pipermail/krb5-bugs/2013-November/010206.html</a> [2] <a href="https://github.com/krb5/krb5/commit/5d2d9a1abe46a2c1a8614d4672d08d9d30a5f8bf">https://github.com/krb5/krb5/commit/5d2d9a1abe46a2c1a8614d4672d08d9d30a5f8bf</a>
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/krb5 | <1.10.7 | 1.10.7 |
| MIT Kerberos 5 Application | <1.10.7 | |
| Debian | =7.0 | |
| openSUSE | =11.4 | |
| openSUSE | =12.2 | |
| openSUSE | =12.3 | |
| openSUSE | =13.1 |
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Reference Links
- http://mailman.mit.edu/pipermail/krb5-bugs/2013-November/010206.html
- https://github.com/krb5/krb5/commit/5d2d9a1abe46a2c1a8614d4672d08d9d30a5f8bf
- http://krbdev.mit.edu/rt/Ticket/Display.html?id=7757
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1026997
- https://rhn.redhat.com/errata/RHSA-2014-1245.html
- https://rhn.redhat.com/errata/RHSA-2014-1389.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1026942
- http://advisories.mageia.org/MGASA-2013-0335.html
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00082.html
- http://lists.opensuse.org/opensuse-updates/2013-11/msg00086.html
- http://lists.opensuse.org/opensuse-updates/2013-12/msg00026.html
- http://web.mit.edu/kerberos/krb5-1.10/README-1.10.7.txt
- http://web.mit.edu/kerberos/krb5-1.11/README-1.11.4.txt
- http://www.securityfocus.com/bid/63555
- https://github.com/krb5/krb5/commit/c2ccf4197f697c4ff143b8a786acdd875e70a89d
- https://lists.debian.org/debian-lts-announce/2018/01/msg00040.html
Frequently Asked Questions
What is the severity of CVE-2013-1418?
CVE-2013-1418 has a high severity level as it can be exploited by an unauthenticated user to crash the Key Distribution Center.
How do I fix CVE-2013-1418?
To fix CVE-2013-1418, upgrade the krb5 package to version 1.10.7 or later.
What systems are affected by CVE-2013-1418?
CVE-2013-1418 affects several versions of the krb5 package on Red Hat, MIT Kerberos 5, Debian, and multiple versions of openSUSE.
Can CVE-2013-1418 be exploited remotely?
Yes, CVE-2013-1418 can be exploited remotely by an unauthenticated user depending on the KDC setup.
Was CVE-2013-1418 known before it was reported?
CVE-2013-1418 emerged from user reports and has been addressed in subsequent updates to the affected software.
- collector/redhat-bugzilla
- alias/CVE-2013-1418
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