Incomplete blacklist vulnerability in the chfn function in libuser before...

Vulnerability Description

Incomplete blacklist vulnerability in the chfn function in libuser before 0.56.13-8 and 0.60 before 0.60-7, as used in the userhelper program in the usermode package, allows local users to cause a denial of service (/etc/passwd corruption) via a newline character in the GECOS field.

References

• http://lists.fedoraproject.org/pipermail/package-announce/2015-July/162947.html
• https://www.exploit-db.com/exploits/44633/
• https://access.redhat.com/articles/1537873
• http://rhn.redhat.com/errata/RHSA-2015-1482.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163044.html
• https://www.qualys.com/2015/07/23/cve-2015-3245-cve-2015-3246/cve-2015-3245-cve-2015-3246.txt
• http://www.securitytracker.com/id/1033040
• http://www.securityfocus.com/bid/76021
• http://rhn.redhat.com/errata/RHSA-2015-1483.html