Race condition in PulseAudio 0.9.9, 0.9.10, and 0.9.14 allows local users to gain privileges via vectors involving creation of a hard link, related to the application setting LD_BIND_NOW to 1, and then calling execv on the target of the /proc/self/exe symlink.

References

• https://nvd.nist.gov/vuln/detail/CVE-2009-1894
• https://admin.fedoraproject.org/updates/pulseaudio-0.9.10-1.el5.2
• https://bugzilla.redhat.com/show_bug.cgi?id=510071
• https://exchange.xforce.ibmcloud.com/vulnerabilities/51804
• http://blog.cr0.org/2009/07/old-school-local-root-vulnerability-in.html
• http://secunia.com/advisories/35868
• http://secunia.com/advisories/35886
• http://secunia.com/advisories/35896
• http://security.gentoo.org/glsa/glsa-200907-13.xml
• http://taviso.decsystem.org/research.html
• http://www.akitasecurity.nl/advisory.php?id=AK20090602
• http://www.debian.org/security/2009/dsa-1838
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:152
• http://www.mandriva.com/security/advisories?name=MDVSA-2009:171
• http://www.securityfocus.com/archive/1/505052/100/0/threaded
• http://www.securityfocus.com/bid/35721
• http://www.ubuntu.com/usn/usn-804-1
• https://access.redhat.com/security/cve/CVE-2009-1894