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stunnel: Arbitrary code execution


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201202-08 / ebuild stunnel
Release Date February 29, 2012
Latest Revision July 30, 2012: 2
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/stunnel < 4.44 >= 4.44, < 4 All supported architectures

Related bugreports: #379859


A vulnerability was found in stunnel, allowing remote attackers to cause a Denial of Service and potentially arbitrary code execution.

2.  Impact Information


The stunnel program is designed to work as an SSL encryption wrapper between a client and a local or remote server.


An unspecified heap vulnerability was discovered in stunnel.


The vulnerability may possibly be leveraged to perform remote code execution or a Denial of Service attack.

3.  Resolution Information


There is no known workaround at this time.


All stunnel 4.x users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/stunnel-4.44"

4.  References


Page updated February 29, 2012

Summary: This is a Gentoo Linux Security Advisory

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