Dropbear: Privilege escalation — GLSA 201607-08

A vulnerability has been found in Dropbear, which allows remote authenticated users to bypass intended shell-command restrictions.

Affected Packages

net-misc/dropbear on all architectures
Affected versions < 2016.73
Unaffected versions >= 2016.73

Background

Dropbear is a relatively small SSH server and client.

Description

A CRLF injection vulnerability in Dropbear SSH allows remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data.

Impact

A remote authenticated user could execute arbitrary code with the privileges of the process.

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-2016.73"
 

References

Release Date
July 20, 2016

Latest Revision
July 20, 2016: 1

Severity
normal

Exploitable
remote

Bugzilla entries