GLSA 200711-02: OpenSSH: Security bypass

http://security.gentoo.org/

Severity:	low
Title:	OpenSSH: Security bypass
Date:	11/01/2007
Bugs:	#191321
ID:	200711-02

Synopsis

A flaw has been discovered in OpenSSH which could allow a local attacker to bypass security restrictions.

Background

OpenSSH is a complete SSH protocol implementation that includes an SFTP client and server support.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/openssh	< 4.7	>= 4.7	All supported architectures

Description

Jan Pechanec discovered that OpenSSH uses a trusted X11 cookie when it cannot create an untrusted one.

Impact

An attacker could bypass the SSH client security policy and gain privileges by causing an X client to be treated as trusted.

Workaround

There is no known workaround at this time.

Resolution

All OpenSSH users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/openssh-4.7"

References

CVE-2007-4752

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200711-02.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.