GLSA 200710-01: RPCSEC_GSS library: Buffer overflow

http://security.gentoo.org/

Severity:	high
Title:	RPCSEC_GSS library: Buffer overflow
Date:	10/04/2007
Bugs:	#191479
ID:	200710-01

Synopsis

A buffer overflow vulnerability has been discovered in librpcsecgss.

Background

librpcsecgss is an implementation of RPCSEC_GSS for secure RPC communications.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-libs/librpcsecgss	< 0.16	>= 0.16	All supported architectures

Description

A stack based buffer overflow has been discovered in the svcauth_gss_validate() function in file lib/rpc/svc_auth_gss.c when processing an overly long string in a RPC message.

Impact

A remote attacker could send a specially crafted RPC request to an application relying on this library, e.g NFSv4 or Kerberos (GLSA-200709-01), resulting in the execution of arbitrary code with the privileges of the user running the application.

Workaround

There is no known workaround at this time.

Resolution

All librpcsecgss users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/librpcsecgss-0.16"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200710-01.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.