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[ GLSA 200502-28 ] PuTTY: Remote code execution
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GLSA
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Joined: 13 Jun 2003
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Location: Barcelona, Spain

PostPosted: Mon Feb 21, 2005 9:05 pm    Post subject: [ GLSA 200502-28 ] PuTTY: Remote code execution Reply with quote

Gentoo Linux Security Advisory

Title: PuTTY: Remote code execution (GLSA 200502-28)
Severity: normal
Exploitable: remote
Date: February 21, 2005
Bug(s): #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: net-misc/putty
Vulnerable: < 0.57
Unaffected: >= 0.57
Architectures: 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:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/putty-0.57"


References

PuTTY vulnerability vuln-sftp-readdir
PuTTY vulnerability vuln-sftp-string
CAN-2005-0467
iDEFENSE Advisory


Last edited by GLSA on Sun May 07, 2006 4:55 pm; edited 1 time in total
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