Bug 291352 (CVE-2009-3623)

Summary:	Kernel: lookup_cb_cred() DoS (CVE-2009-3623)
Product:	Gentoo Security	Reporter:	Alex Legler (RETIRED) <a3li>
Component:	Kernel	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	hardened-kernel+disabled, kernel
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=80fc015bdfe1f5b870c1e1ee02d78e709523fee7
Whiteboard:	[linux <2.6.31]
Package list:		Runtime testing required:	---

Description Alex Legler (RETIRED) archtester

2009-10-31 19:13:12 UTC

CVE-2009-3623 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3623):
  The lookup_cb_cred function in fs/nfsd/nfs4callback.c in the nfsd4
  subsystem in the Linux kernel before 2.6.31.2 attempts to access a
  credentials cache even when a client specifies the AUTH_NULL
  authentication flavor, which allows remote attackers to cause a
  denial of service (NULL pointer dereference and system crash) via an
  NFSv4 mount request.