Russ Allbery pam-krb5 before 3.13, as used by libpam-heimdal, su in Solaris 10, and other software, does not properly handle calls to pam_setcred when running setuid, which allows local users to overwrite and change the ownership of arbitrary files by setting the KRB5CCNAME environment variable, and then launching a setuid application that performs certain pam_setcred operations.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-0361
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5403
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5521
• http://secunia.com/advisories/33914
• http://secunia.com/advisories/33917
• http://secunia.com/advisories/33918
• http://secunia.com/advisories/34260
• http://secunia.com/advisories/34449
• http://security.gentoo.org/glsa/glsa-200903-39.xml
• http://securitytracker.com/id?1021711
• http://sunsolve.sun.com/search/document.do?assetkey=1-66-252767-1
• http://support.avaya.com/elmodocs2/security/ASA-2009-070.htm
• http://www.debian.org/security/2009/dsa-1721
• http://www.debian.org/security/2009/dsa-1722
• http://www.eyrie.org/~eagle/software/pam-krb5/security/2009-02-11.html
• http://www.securityfocus.com/archive/1/500892/100/0/threaded
• http://www.securityfocus.com/bid/33741
• http://www.ubuntu.com/usn/USN-719-1
• http://www.vupen.com/english/advisories/2009/0410
• http://www.vupen.com/english/advisories/2009/0426
• http://www.vupen.com/english/advisories/2009/0979