Joined: 13 Jun 2003
Location: Barcelona, Spain
|Posted: Thu Aug 05, 2004 12:51 pm Post subject: [ GLSA 200408-04 ] PuTTY: Pre-authentication arbitrary code
|Gentoo Linux Security Advisory
Title: PuTTY: Pre-authentication arbitrary code execution (GLSA 200408-04)
Date: August 05, 2004
Updated: May 22, 2006
PuTTY contains a vulnerability allowing a SSH server to execute arbitrary
code on the connecting client.
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix
platforms, along with an xterm terminal emulator.
Vulnerable: <= 0.54
Unaffected: >= 0.55
Architectures: All supported architectures
PuTTY contains a vulnerability allowing a malicious server to execute
arbitrary code on the connecting client before host key verification.
When connecting to a server using the SSH2 protocol an attacker is able
to execute arbitrary code with the permissions of the user running
PuTTY by sending specially crafted packets to the client during the
authentication process but before host key verification.
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version of PuTTY.
All PuTTY users should upgrade to the latest version:
|# emerge sync
# emerge -pv ">=net-misc/putty-0.55"
# emerge ">=net-misc/putty-0.55"
Last edited by GLSA on Fri May 09, 2014 4:17 am; edited 6 times in total