FreeBSD up to 10.0 nfsserver resource management

CVSS Meta Temp Score
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3.8$0-$5k0.00

A vulnerability was found in FreeBSD up to 10.0 (Operating System). It has been classified as problematic. Affected is some unknown processing of the component nfsserver. The manipulation with an unknown input leads to a resource management vulnerability. CWE is classifying the issue as CWE-399. This is going to have an impact on availability. CVE summarizes:

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.

The weakness was presented 04/08/2014 by Rick Macklem as FreeBSD-SA-14:05 as confirmed advisory (Website). The advisory is available at security.FreeBSD.org. This vulnerability is traded as CVE-2014-1453 since 01/14/2014. It is possible to launch the attack remotely. Required for exploitation is a authentication. The technical details are unknown and an exploit is not available. The advisory points out:

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.

The vulnerability scanner Nessus provides a plugin with the ID 74374 (Debian DSA-2952-1 : kfreebsd-9 - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The advisory illustrates:

To determine which implementation an NFS server is running, run the following command: "kldstat -v | grep -cw nfsd"

Upgrading eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at security.FreeBSD.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. The advisory contains the following remark:

Systems that do not provide NFS services are not vulnerable. Neither are systems that do but use the old NFS implementation, which is the default in FreeBSD 8.x.

The vulnerability is also documented in the databases at X-Force (92605) and Tenable (74374). See 13104 and 13483 for similar entries.

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 3.8

VulDB Base Score: 4.3
VulDB Temp Score: 3.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74374
Nessus Name: Debian DSA-2952-1 : kfreebsd-9 - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 702952
OpenVAS Name: Debian Security Advisory DSA 2952-1 (kfreebsd-9 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
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Exposure Time: 🔍

Patch: security.FreeBSD.org

Timelineinfo

01/14/2014 🔍
04/08/2014 +84 days 🔍
04/08/2014 +0 days 🔍
04/09/2014 +1 days 🔍
04/09/2014 +0 days 🔍
04/09/2014 +0 days 🔍
04/09/2014 +0 days 🔍
04/09/2014 +0 days 🔍
04/10/2014 +1 days 🔍
04/16/2014 +6 days 🔍
06/09/2014 +54 days 🔍
06/16/2021 +2564 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: FreeBSD-SA-14:05
Researcher: Rick Macklem
Status: Confirmed

CVE: CVE-2014-1453 (🔍)
OVAL: 🔍

X-Force: 92605 - FreeBSD lock order denial of service, Medium Risk
SecurityTracker: 1030041 - FreeBSD NFS Server Deadlock Bug Lets Remote Authenticated Users Deny Service
Vulnerability Center: 43982 - FreeBSD Remote Denial of Service Vulnerability, Medium
SecurityFocus: 66726 - FreeBSD CVE-2014-1453 Remote Denial of Service Vulnerability
Secunia: 57760 - FreeBSD NFS Server Vnode Deadlock Denial of Service Vulnerability, Not Critical

See also: 🔍

Entryinfo

Created: 04/09/2014 17:56
Updated: 06/16/2021 18:54
Changes: 04/09/2014 17:56 (84), 05/24/2017 20:00 (6), 06/16/2021 18:54 (3)
Complete: 🔍
Cache ID: 3:244:103

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