GLSA 200703-13: SSH Communications Security's Secure Shell Server: SFTP privilege escalation

http://security.gentoo.org/

Severity:	normal
Title:	SSH Communications Security's Secure Shell Server: SFTP privilege escalation
Date:	03/14/2007
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
net-misc/ssh	< 4.3.7		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:

    # emerge --ask --verbose --unmerge net-misc/ssh

References

CVE-2006-0705

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200703-13.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.