CVE-2014-9421: Use After Free
First published: Thu Feb 19 2015(Updated: )
The auth_gssapi_unwrap_data function in lib/rpc/auth_gssapi_misc.c in MIT Kerberos 5 (aka krb5) through 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1 does not properly handle partial XDR deserialization, which allows remote authenticated users to cause a denial of service (use-after-free and double free, and daemon crash) or possibly execute arbitrary code via malformed XDR data, as demonstrated by data sent to kadmind.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| MIT Kerberos 5 Application | =1.11 | |
| MIT Kerberos 5 Application | =1.11.1 | |
| MIT Kerberos 5 Application | =1.11.2 | |
| MIT Kerberos 5 Application | =1.11.3 | |
| MIT Kerberos 5 Application | =1.11.4 | |
| MIT Kerberos 5 Application | =1.11.5 | |
| MIT Kerberos 5 Application | =1.12 | |
| MIT Kerberos 5 Application | =1.12.1 | |
| MIT Kerberos 5 Application | =1.12.2 | |
| MIT Kerberos 5 Application | =1.13 |
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Reference Links
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151103.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151437.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00011.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00016.html
- http://lists.opensuse.org/opensuse-updates/2015-02/msg00044.html
- http://rhn.redhat.com/errata/RHSA-2015-0439.html
- http://rhn.redhat.com/errata/RHSA-2015-0794.html
- http://web.mit.edu/kerberos/advisories/2015-001-patch-r113.txt
- http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2015-001.txt
- http://www.debian.org/security/2015/dsa-3153
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:069
- http://www.securityfocus.com/bid/72496
- http://www.ubuntu.com/usn/USN-2498-1
- https://github.com/krb5/krb5/commit/a197e92349a4aa2141b5dff12e9dd44c2a2166e3
Frequently Asked Questions
What is the severity of CVE-2014-9421?
CVE-2014-9421 is categorized as a denial of service vulnerability.
What versions of MIT Kerberos 5 are affected by CVE-2014-9421?
CVE-2014-9421 affects MIT Kerberos 5 versions 1.11.5, 1.12.x through 1.12.2, and 1.13.x before 1.13.1.
How do I fix CVE-2014-9421?
To fix CVE-2014-9421, upgrade to MIT Kerberos 5 version 1.13.1 or later.
Can CVE-2014-9421 be exploited remotely?
Yes, CVE-2014-9421 can be exploited by remote authenticated users.
What does the CVE-2014-9421 vulnerability affect in MIT Kerberos 5?
CVE-2014-9421 affects the auth_gssapi_unwrap_data function, specifically in handling partial XDR deserialization.
- agent/weakness
- agent/references
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- agent/description
- agent/author
- agent/severity
- agent/event
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/softwarecombine
- agent/tags
- vendor/mit
- canonical/mit kerberos 5 application
- version/mit kerberos 5 application/1.11
- version/mit kerberos 5 application/1.11.1
- version/mit kerberos 5 application/1.11.2
- version/mit kerberos 5 application/1.11.3
- version/mit kerberos 5 application/1.11.4
- version/mit kerberos 5 application/1.11.5
- version/mit kerberos 5 application/1.12
- version/mit kerberos 5 application/1.12.1
- version/mit kerberos 5 application/1.12.2
- version/mit kerberos 5 application/1.13