6.4
MEDIUM
CVE-2013-4851
FreeBSD NFS Server NFS Permissions Bypass
Description

The vfs_hang_addrlist function in sys/kern/vfs_export.c in the NFS server implementation in the kernel in FreeBSD 8.3 and 9.x through 9.1-RELEASE-p5 controls authorization for host/subnet export entries on the basis of group information sent by the client, which allows remote attackers to bypass file permissions on NFS filesystems via crafted requests.

INFO

Published Date :

July 29, 2013, 1:59 p.m.

Last Modified :

March 18, 2019, 3:35 p.m.

Remotely Exploitable :

Yes !

Impact Score :

4.9

Exploitability Score :

10.0
Affected Products

The following products are affected by CVE-2013-4851 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Freebsd freebsd
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2013-4851.

URL Resource
http://svnweb.freebsd.org/base?view=revision&revision=244226
http://www.freebsd.org/security/advisories/FreeBSD-SA-13:08.nfsserver.asc
http://www.securityfocus.com/bid/61484

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2013-4851 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2013-4851 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CPE Deprecation Remap by [email protected]

    Mar. 18, 2019

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:9.1:release-p5:*:*:*:*:*:* OR *cpe:2.3:o:freebsd:freebsd:9.1:p5:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Mar. 18, 2019

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:o:freebsd:freebsd:9.1:release-p4:*:*:*:*:*:* OR *cpe:2.3:o:freebsd:freebsd:9.1:p4:*:*:*:*:*:*
  • Initial Analysis by [email protected]

    Jul. 29, 2013

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2013-4851 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2013-4851 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.35 }} -0.35%

score

0.71745

percentile

CVSS2 - Vulnerability Scoring System
Access Vector
Access Complexity
Authentication
Confidentiality
Integrity
Availability