#VU45334 Input validation error in Kerberos 5 - CVE-2010-4022
Vulnerability identifier: #VU45334
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-2010-4022
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 a remote non-authenticated attacker to perform service disruption.
The do_standalone function in the MIT krb5 KDC database propagation daemon (kpropd) in Kerberos 1.7, 1.8, and 1.9, when running in standalone mode, does not properly handle when a worker child process "exits abnormally," which allows remote attackers to cause a denial of service (listening process termination, no new connections, and lack of updates in slave KVC) via unspecified vectors.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Kerberos 5: 1.7 - 1.9
External links
https://lists.opensuse.org/opensuse-security-announce/2011-02/msg00004.html
https://secunia.com/advisories/43260
https://secunia.com/advisories/43275
https://securityreason.com/securityalert/8070
https://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-001.txt
https://www.mandriva.com/security/advisories?name=MDVSA-2011:025
https://www.redhat.com/support/errata/RHSA-2011-0200.html
https://www.securityfocus.com/archive/1/516286/100/0/threaded
https://www.securityfocus.com/bid/46269
https://www.securitytracker.com/id?1025035
https://www.vupen.com/english/advisories/2011/0329
https://www.vupen.com/english/advisories/2011/0333
https://www.vupen.com/english/advisories/2011/0347
https://www.vupen.com/english/advisories/2011/0464
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.
