Dropbear: Multiple vulnerabilities — GLSA 201309-20

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

Affected Packages

net-misc/dropbear on all architectures
Affected versions < 2012.55
Unaffected versions >= 2012.55

Background

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

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:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/dropbear-2012.55"
 

References

Release Date
September 26, 2013

Latest Revision
September 26, 2013: 1

Severity
normal

Exploitable
remote

Bugzilla entries