PuTTY: Remote code execution
Gentoo Linux Security Advisory
||GLSA 200502-28 / Putty
||February 21, 2005
||February 21, 2005: 01
All supported architectures
PuTTY was found to contain vulnerabilities that can allow a malicious SFTP
server to execute arbitrary code on unsuspecting PSCP and PSFTP clients.
PuTTY is a popular SSH client, PSCP is a secure copy
implementation, and PSFTP is a SSH File Transfer Protocol client.
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.
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.
There is no known workaround at this time.
All PuTTY users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/putty-0.57"