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CVE-2009-3623

Status Candidate

Overview

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.

Related Files

Ubuntu Security Notice 864-1
Posted Dec 5, 2009
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 864-1 - Kernel packages have been updated. It was discovered that the AX.25 network subsystem did not correctly check integer signedness in certain setsockopt calls. Jan Beulich discovered that the kernel could leak register contents to 32-bit processes that were switched to 64-bit mode. Dave Jones discovered that the gdth SCSI driver did not correctly validate array indexes in certain ioctl calls. Eric Dumazet and Jiri Pirko discovered that the TC and CLS subsystems would leak kernel memory via uninitialized structure members. Earl Chew discovered race conditions in pipe handling. There are about a dozen other issues also addressed.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2009-2909, CVE-2009-2910, CVE-2009-3080, CVE-2009-3228, CVE-2009-3547, CVE-2009-3612, CVE-2009-3613, CVE-2009-3620, CVE-2009-3621, CVE-2009-3623, CVE-2009-3624, CVE-2009-3638, CVE-2009-3722, CVE-2009-3725, CVE-2009-3726, CVE-2009-3888, CVE-2009-3889, CVE-2009-3939
SHA-256 | 2f9e8bf3729b664a290f690db75777d46200920190578d7da876f4919fea4eae
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