CVE-2009-3623

Linux Kernel < 2.6.31.1 - Authentication Bypass

Title source: rule

Description

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.

References (8)

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=80fc015bdfe1f5b870c1e1ee02d78e709523fee7

[Patch] http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=886e3b7fe6054230c89ae078a09565ed183ecc73

[Mailing List] http://marc.info/?l=oss-security&m=125618753029631&w=2

[Mailing List] http://marc.info/?l=oss-security&m=125624036516377&w=2

[Vendor Advisory] http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.2

[Vendor Advisory] http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.32-rc1

[Vendor Advisory] http://www.ubuntu.com/usn/usn-864-1

[Issue Tracking] https://bugzilla.redhat.com/show_bug.cgi?id=530269

Scores

EPSS 0.0133

EPSS Percentile 79.7%

Classification

CWE

CWE-287

Status draft

Affected Products (50)

linux/linux_kernel < 2.6.31.1

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

linux/linux_kernel

... and 35 more

Timeline

Published Oct 30, 2009

Tracked Since Feb 18, 2026