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CVE-2013-3266

Status Candidate

Overview

The nfsrvd_readdir function in sys/fs/nfsserver/nfs_nfsdport.c in the new NFS server in FreeBSD 8.0 through 9.1-RELEASE-p3 does not verify that a READDIR request is for a directory node, which allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by specifying a plain file instead of a directory.

Related Files

Debian Security Advisory 2672-1
Posted May 23, 2013
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2672-1 - Adam Nowacki discovered that the new FreeBSD NFS implementation processes a crafted READDIR request which instructs to operate a file system on a file node as if it were a directory node, leading to a kernel crash or potentially arbitrary code execution.

tags | advisory, arbitrary, kernel, code execution
systems | linux, freebsd, debian
advisories | CVE-2013-3266
SHA-256 | 8eabdee56b79c7299333824f4fec68170872a9111bb52fc743a14016b0ae8d10
FreeBSD Security Advisory - NFS Server Input Validation
Posted Apr 30, 2013
Site security.freebsd.org

FreeBSD Security Advisory - When processing READDIR requests, the NFS server does not check that it is in fact operating on a directory node. An attacker can use a specially modified NFS client to submit a READDIR request on a file, causing the underlying filesystem to interpret that file as a directory.

tags | advisory
systems | freebsd
advisories | CVE-2013-3266
SHA-256 | bdaaa4f57ae7233f6c31b6eae202bb3c0468403f3d7945ce9f1166ffc3299396
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