#VU45333 Input validation error in Kerberos 5 - CVE-2011-0283

Vulnerability identifier: #VU45333

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-0283

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

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

Vendor: MIT

Description

The vulnerability allows remote attackers to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and daemon crash) via a malformed request packet that does not trigger a response packet.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Kerberos 5: 1.9

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External links
https://secunia.com/advisories/43260
https://securityreason.com/securityalert/8073
https://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-002.txt
https://www.securityfocus.com/archive/1/516299/100/0/threaded
https://www.securityfocus.com/bid/46272
https://www.securitytracker.com/id?1025037
https://www.vupen.com/english/advisories/2011/0330

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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.