XScreenSaver 4.10, when using a remote directory service for credentials, does not properly handle the results from the getpwuid function in drivers/lock.c when there is no network connectivity, which causes XScreenSaver to crash and unlock the screen and allows local users to bypass authentication.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11459
https://issues.rpath.com/browse/RPL-1293
https://exchange.xforce.ibmcloud.com/vulnerabilities/34054
http://www.ubuntu.com/usn/usn-474-1
http://www.securitytracker.com/id?1017996
http://www.securityfocus.com/bid/23783
http://www.redhat.com/support/errata/RHSA-2007-0322.html
http://www.novell.com/linux/security/advisories/2007_9_sr.html
http://www.mandriva.com/security/advisories?name=MDKSA-2007:097
http://security.gentoo.org/glsa/glsa-200705-14.xml
http://secunia.com/advisories/25610
http://secunia.com/advisories/25225
http://secunia.com/advisories/25119
http://secunia.com/advisories/25118
http://secunia.com/advisories/25116
http://secunia.com/advisories/25105