Multiple vulnerabilities have been found in MCrypt, allowing attackers to execute arbitrary code or cause Denial of Service.

Announced

2014-05-18

Revised

2014-05-18

Access

remote

Bugs

#434112 #440778

Advisory

https://security.gentoo.org/glsa/201405-19

Affected packages

Package	Arch	Vulnerable	Unaffected
app-crypt/mcrypt	*	< 2.6.8-r2	>= 2.6.8-r2

Background

MCrypt is a replacement of the old unix crypt(1) utility.

Description

Multiple vulnerabilities have been discovered in MCrypt:

• A boundary error in MCrypt could cause a stack-based buffer overflow (CVE-2012-4409).
• MCrypt contains multiple format string errors (CVE-2012-4426).
• MCrypt does not properly handle long file names, which could cause a stack-based buffer overflow (CVE-2012-4527).

Impact

A remote attacker could entice a user to open a specially crafted file using MCrypt, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All MCrypt users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=app-crypt/mcrypt-2.6.8-r2"

References

• CVE-2012-4409
• CVE-2012-4426
• CVE-2012-4527