[ GLSA 200710-01 ] RPCSEC_GSS library: Buffer overflow

[GLSA]

Gentoo Linux Security Advisory

Title: RPCSEC_GSS library: Buffer overflow (GLSA 200710-01)
Severity: high
Exploitable: remote
Date: October 04, 2007
Bug(s): #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: net-libs/librpcsecgss
Vulnerable: < 0.16
Unaffected: >= 0.16
Architectures: 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: