RPCSEC_GSS library: Buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200710-01 / librcpsecgss
Release Date	October 04, 2007
Latest Revision	October 04, 2007: 01
Impact	high
Exploitable	remote

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

Related bugreports: #191479

Synopsis

A buffer overflow vulnerability has been discovered in librpcsecgss.

2. Impact Information

Background

librpcsecgss is an implementation of RPCSEC_GSS for secure RPC communications.

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.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All librpcsecgss users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4. References

Page updated October 04, 2007

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.