GLSA 200502-28: PuTTY: Remote code execution

http://security.gentoo.org/

Severity:	normal
Title:	PuTTY: Remote code execution
Date:	02/21/2005
Bugs:	#82753
ID:	200502-28

Synopsis

PuTTY was found to contain vulnerabilities that can allow a malicious SFTP server to execute arbitrary code on unsuspecting PSCP and PSFTP clients.

Background

PuTTY is a popular SSH client, PSCP is a secure copy implementation, and PSFTP is a SSH File Transfer Protocol client.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/putty	< 0.57	>= 0.57	All supported architectures

Description

Two vulnerabilities have been discovered in the PSCP and PSFTP clients, which can be triggered by the SFTP server itself. These issues are caused by the improper handling of the FXP_READDIR response, along with other string fields.

Impact

An attacker can setup a malicious SFTP server that would send these malformed responses to a client, potentially allowing the execution of arbitrary code on their system.

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-0.57"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200502-28.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.