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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-4022
• http://lists.opensuse.org/opensuse-security-announce/2011-02/msg00004.html
• http://secunia.com/advisories/43260
• http://secunia.com/advisories/43275
• http://securityreason.com/securityalert/8070
• http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-001.txt
• http://www.mandriva.com/security/advisories?name=MDVSA-2011:025
• http://www.redhat.com/support/errata/RHSA-2011-0200.html
• http://www.securityfocus.com/archive/1/516286/100/0/threaded
• http://www.securityfocus.com/bid/46269
• http://www.securitytracker.com/id?1025035
• http://www.vupen.com/english/advisories/2011/0329
• http://www.vupen.com/english/advisories/2011/0333
• http://www.vupen.com/english/advisories/2011/0347
• http://www.vupen.com/english/advisories/2011/0464