sudo 1.6.x before 1.6.9p21, when the runas_default option is used, does not properly set group memberships, which allows local users to gain privileges via a sudo command.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-0427
• https://bugzilla.redhat.com/show_bug.cgi?id=567622
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10946
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7216
• http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
• http://secunia.com/advisories/38762
• http://secunia.com/advisories/38795
• http://secunia.com/advisories/38803
• http://secunia.com/advisories/38915
• http://securitytracker.com/id?1023658
• http://sudo.ws/repos/sudo/rev/aa0b6c01c462
• http://wiki.rpath.com/Advisories:rPSA-2010-0075
• http://www.debian.org/security/2010/dsa-2006
• http://www.gentoo.org/security/en/glsa/glsa-201003-01.xml
• http://www.gratisoft.us/bugzilla/attachment.cgi?id=255
• http://www.gratisoft.us/bugzilla/show_bug.cgi?id=349
• http://www.openwall.com/lists/oss-security/2010/02/23/4
• http://www.openwall.com/lists/oss-security/2010/02/24/5
• http://www.securityfocus.com/archive/1/514489/100/0/threaded
• http://www.sudo.ws/cgi-bin/cvsweb/sudo/set_perms.c.diff?r1=1.30.2.7&r2=1.30.2.8
• http://www.ubuntu.com/usn/USN-905-1