libgio, when used in setuid or other privileged programs in spice-gtk and possibly other products, allows local users to gain privileges and execute arbitrary code via the DBUS_SYSTEM_BUS_ADDRESS environment variable. NOTE: it could be argued that this is a vulnerability in the applications that do not cleanse environment variables, not in libgio itself.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-4425
• https://bugzilla.redhat.com/show_bug.cgi?id=857283
• http://permalink.gmane.org/gmane.linux.redhat.fedora.extras.cvs/853051
• http://rhn.redhat.com/errata/RHSA-2012-1284.html
• http://www.exploit-db.com/exploits/21323
• http://www.openwall.com/lists/oss-security/2012/09/12/6
• http://www.openwall.com/lists/oss-security/2012/09/14/2
• http://www.openwall.com/lists/oss-security/2012/09/17/2
• http://www.securityfocus.com/bid/55555
• http://www.spinics.net/lists/spice-devel/msg01940.html