PuTTY: Buffer overflow — GLSA 201703-03

A buffer overflow in PuTTY might allow remote attackers to execute arbitrary code or cause a denial of service.

Affected Packages

net-misc/putty on all architectures
Affected versions < 0.68
Unaffected versions >= 0.68

Background

PuTTY is a free implementation of Telnet and SSH for Windows and Unix platforms, along with an xterm terminal emulator.

Description

A heap-corrupting buffer overflow bug in the ssh_agent_channel_data function of PuTTY was found.

Impact

A remote attacker, utilizing the SSH agent forwarding of an SSH server, could execute arbitrary code with the privileges of the user running the client or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All PuTTY users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=net-misc/putty-0.68"
 

References

Release Date
March 19, 2017

Latest Revision
March 19, 2017: 1

Severity
normal

Exploitable
remote

Bugzilla entries