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[ GLSA 201405-19 ] MCrypt: User-assisted execution of arbitrary code
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PostPosted: Sun May 18, 2014 5:26 pm    Post subject: [ GLSA 201405-19 ] MCrypt: User-assisted execution of arbitr Reply with quote

Gentoo Linux Security Advisory

Title: MCrypt: User-assisted execution of arbitrary code (GLSA 201405-19)
Severity: normal
Exploitable: remote
Date: May 18, 2014
Bug(s): #434112, #440778
ID: 201405-19

Synopsis

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


Background

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

Affected Packages

Package: app-crypt/mcrypt
Vulnerable: < 2.6.8-r2
Unaffected: >= 2.6.8-r2
Architectures: All supported architectures


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


References

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