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[ GLSA 201309-20 ] Dropbear: Multiple vulnerabilities
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PostPosted: Fri Sep 27, 2013 12:26 am    Post subject: [ GLSA 201309-20 ] Dropbear: Multiple vulnerabilities Reply with quote

Gentoo Linux Security Advisory

Title: Dropbear: Multiple vulnerabilities (GLSA 201309-20)
Severity: normal
Exploitable: remote
Date: September 26, 2013
Bug(s): #328409, #405607
ID: 201309-20

Synopsis

Multiple vulnerabilities have been found in Dropbear, the worst of
which could lead to arbitrary code execution.


Background

Dropbear is an SSH server and client designed with a small memory
footprint.


Affected Packages

Package: net-misc/dropbear
Vulnerable: < 2012.55
Unaffected: >= 2012.55
Architectures: All supported architectures


Description

Multiple vulnerabilities have been discovered in Dropbear. Please review
the CVE identifier and Gentoo bug referenced below for details.


Impact

A remote attacker could send a specially crafted request to trigger a
use-after-free condition, possibly resulting in arbitrary code execution
or a Denial of Service condition. Additionally, the bundled version of
libtommath has an error in its prime number generation, which could
result in the generation of weak keys.


Workaround

There is no known workaround at this time.

Resolution

All Dropbear users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=net-misc/dropbear-2012.55"
   


References

CVE-2012-0920
libtommath
Gentoo bug
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