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Unscored Public exploit CVE-2009-3726 EUVD-2009-3698GHSA-76cp-8jf4-8pv2

The nfs4_proc_lock function in fs/nfs/nfs4proc.c in the NFSv4 client in the Linux kernel before 2.6.31-rc4 allows remote NFS servers to cau…

Published Nov 9, 2009 · Updated Aug 7, 2024 · Assigned by redhat

Description

The nfs4_proc_lock function in fs/nfs/nfs4proc.c in the NFSv4 client in the Linux kernel before 2.6.31-rc4 allows remote NFS servers to cause a denial of service (NULL pointer dereference and panic) by sending a certain response containing incorrect file attributes, which trigger attempted use of an open file that lacks NFSv4 state.

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

Debian

Security tracker ↗
ReleasePackageFixed inAdvisory
Debian 4.0 linux-2.6 2.6.18.dfsg.1-26etch2 DSA-2003-1
Debian 4.0 linux-2.6.24 2.6.24-6~etchnhalf.9etch3 DSA-2005-1

Red Hat

Security tracker ↗
ReleasePackageFixed inAdvisory
RHEL 5 kernel +12 2.6.18-164.9.1.el5 RHSA-2009:1670
RHEL 4 kernel +10 2.6.9-89.0.26.EL RHSA-2010:0474
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Red Hat MRG 1 kernel-rt +9 2.6.24.7-139.el5rt RHSA-2009:1635

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

Exploit-DB 1

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Advisories 5

References