[ GLSA 200703-13 ] SSH Communications Security's Secure Shell Server: SFTP privilege escalati on

[GLSA]

Gentoo Linux Security Advisory

Title: SSH Communications Security's Secure Shell Server: SFTP privilege escalation (GLSA 200703-13)
Severity: normal
Exploitable: remote
Date: March 14, 2007
Bug(s): #168584
ID: 200703-13

Synopsis


The SSH Secure Shell Server SFTP function is vulnerable to privilege
escalation.


Background


The SSH Secure Shell Server from SSH Communications Security
(www.ssh.com) is a commercial SSH implementation available free for
non-commercial use.


Affected Packages

Package: net-misc/ssh
Vulnerable: < 4.3.7
Architectures: All supported architectures


Description


The SSH Secure Shell Server contains a format string vulnerability in
the SFTP code that handles file transfers (scp2 and sftp2). In some
situations, this code passes the accessed filename to the system log.
During this operation, an unspecified error could allow uncontrolled
stack access.


Impact


An authenticated system user may be able to exploit this vulnerability
to bypass command restrictions, or run commands as another user.


Workaround


There is no known workaround at this time.


Resolution


This package is currently masked, there is no upgrade path for the
3.2.x version, and a license must be purchased in order to update to a
non-vulnerable version. Because of this, we recommend unmerging this
package: