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CVE-2014-1453

Status Candidate

Overview

The NFS server (nfsserver) in FreeBSD 8.3 through 10.0 does not acquire locks in the proper order when converting a directory file handle to a vnode, which allows remote authenticated users to cause a denial of service (deadlock) via vectors involving a thread that uses the correct locking order.

Related Files

Debian Security Advisory 2952-1
Posted Jun 6, 2014
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2952-1 - Several vulnerabilities have been discovered in the FreeBSD kernel that may lead to a denial of service or possibly disclosure of kernel memory.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, freebsd, debian
advisories | CVE-2014-1453, CVE-2014-3000, CVE-2014-3880
SHA-256 | ed9ae58961ec6726a952124bc8bfc4359b78791bff785b07a58275d25c075aa7
FreeBSD Security Advisory - NFS Server Deadlock
Posted Apr 9, 2014
Authored by Rick Macklem | Site security.freebsd.org

FreeBSD Security Advisory - The Network File System (NFS) allows a host to export some or all of its file systems so that other hosts can access them over the network and mount them as if they were on local disks. FreeBSD includes both server and client implementations of NFS. The kernel holds a lock over the source directory vnode while trying to convert the target directory file handle to a vnode, which needs to be returned with the lock held, too. This order may be in violation of normal lock order, which in conjunction with other threads that grab locks in the right order, constitutes a deadlock condition because no thread can proceed. An attacker on a trusted client could cause the NFS server become deadlocked, resulting in a denial of service.

tags | advisory, denial of service, kernel, local
systems | freebsd
advisories | CVE-2014-1453
SHA-256 | 06a17d6d6d665cb7448fdfe9475b3cd86f41e2dbd4f78d7d2cd978834c281738
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