WordPress 3.6 Restrictions input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability, which was classified as critical, has been found in WordPress 3.6 (Content Management System). Affected by this issue is an unknown function of the component Restrictions Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

WordPress before 3.6.1 does not properly validate URLs before use in an HTTP redirect, which allows remote attackers to bypass intended redirection restrictions via a crafted string.

The weakness was disclosed 09/11/2013 as confirmed changelog entry (Website). The advisory is available at codex.wordpress.org. The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2013-4339 since 06/12/2013. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

After 2 weeks, there has been an exploit disclosed. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 69895 (Debian DSA-2757-1 : wordpress - several vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 12751 (WordPress Multiple Security Vulnerabilities).

Upgrading to version 3.6.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at core.trac.wordpress.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 vulnerability is also documented in the databases at X-Force (87058) and Tenable (69895). The entries 10260, 10261, 10263 and 10264 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 69895
Nessus Name: Debian DSA-2757-1 : wordpress - several vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 892757
OpenVAS Name: Debian Security Advisory DSA 2757-1 (wordpress - several vulnerabilities
OpenVAS File: 🔍
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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Exploit Delay Time: 🔍

Upgrade: WordPress 3.6.1
Patch: core.trac.wordpress.org

Timelineinfo

06/12/2013 🔍
09/10/2013 +90 days 🔍
09/10/2013 +0 days 🔍
09/11/2013 +1 days 🔍
09/11/2013 +0 days 🔍
09/12/2013 +1 days 🔍
09/13/2013 +1 days 🔍
09/13/2013 +0 days 🔍
09/21/2013 +8 days 🔍
09/24/2013 +3 days 🔍
05/24/2021 +2799 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: 25323
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2013-4339 (🔍)
OVAL: 🔍
IAVM: 🔍

X-Force: 87058
Vulnerability Center: 41604 - WordPress <3.6.1 Improper URLs Validation in an HTTP Redirect Allows Remote Security Bypass, Medium
SecurityFocus: 62344 - WordPress CVE-2013-4339 Multiple Open Redirection Vulnerabilities
Secunia: 54803 - WordPress Multiple Vulnerabilities, Moderately Critical
OSVDB: 97212

See also: 🔍

Entryinfo

Created: 09/13/2013 17:19
Updated: 05/24/2021 15:58
Changes: 09/13/2013 17:19 (85), 05/11/2017 09:08 (4), 05/24/2021 15:53 (3), 05/24/2021 15:58 (1)
Complete: 🔍
Committer:

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