#VU45191 Resource management error in Kerberos 5 - CVE-2011-0284

Vulnerability identifier: #VU45191

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2011-0284

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Kerberos 5
Client/Desktop applications / Software for system administration

Vendor: MIT

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Double free vulnerability in the prepare_error_as function in do_as_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.7 through 1.9, when the PKINIT feature is enabled, allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via an e_data field containing typed data.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Kerberos 5: 1.7 - 1.9

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2011-March/056413.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-March/056573.html
https://lists.fedoraproject.org/pipermail/package-announce/2011-March/056579.html
https://lists.opensuse.org/opensuse-security-announce/2011-04/msg00000.html
https://osvdb.org/71183
https://secunia.com/advisories/43700
https://secunia.com/advisories/43760
https://secunia.com/advisories/43783
https://secunia.com/advisories/43881
https://securitytracker.com/id?1025216
https://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-003.txt
https://www.kb.cert.org/vuls/id/943220
https://www.mandriva.com/security/advisories?name=MDVSA-2011:048
https://www.redhat.com/support/errata/RHSA-2011-0356.html
https://www.securityfocus.com/archive/1/517029/100/0/threaded
https://www.securityfocus.com/bid/46881
https://www.ubuntu.com/usn/USN-1088-1
https://www.vupen.com/english/advisories/2011/0672
https://www.vupen.com/english/advisories/2011/0673
https://www.vupen.com/english/advisories/2011/0680
https://www.vupen.com/english/advisories/2011/0722
https://www.vupen.com/english/advisories/2011/0763
https://exchange.xforce.ibmcloud.com/vulnerabilities/66101

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.