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rssh: Access restriction bypass

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 201311-19 / rssh
Release Date November 28, 2013
Latest Revision November 28, 2013: 1
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
app-shells/rssh < 2.3.4 >= 2.3.4 All supported architectures

Related bugreports: #415255, #445166

Synopsis

Multiple vulnerabilities have been found in rssh, allowing local attackers to bypass access restrictions.

2.  Impact Information

Background

rssh is a restricted shell, allowing only a few commands like scp or sftp. It is often used as a complement to OpenSSH to provide limited access to users.

Description

Multiple command line parsing and validation vulnerabilities have been discovered in rssh. Please review the CVE identifiers referenced below for details.

Impact

Multiple parsing and validation vulnerabilities can cause the restrictions set up by rssh to be bypassed.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All rssh users should upgrade to the latest version:

Code Listing 3.1: Resolution

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=app-shells/rssh-2.3.4"

4.  References



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Page updated November 28, 2013

Summary: This is a Gentoo Linux Security Advisory

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