WordPress 4.5.2 oEmbed denial of service

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in WordPress 4.5.2. This issue affects some unknown processing of the component oEmbed. The manipulation leads to denial of service. This vulnerability is listed as CVE-2016-5836. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in WordPress 4.5.2 (Content Management System). This issue affects an unknown functionality of the component oEmbed. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

The oEmbed protocol implementation in WordPress before 4.5.3 allows remote attackers to cause a denial of service via unspecified vectors.

The weakness was presented 06/18/2016 as WordPress 4.5.3 Maintenance and Security Release as confirmed news (Website). It is possible to read the advisory at wordpress.org. The public release was coordinated in cooperation with the project team. The identification of this vulnerability is CVE-2016-5836 since 06/23/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK. The advisory points out:

WordPress versions 4.5.2 and earlier are affected by several security issues (...)

The vulnerability scanner Nessus provides a plugin with the ID 91840 (FreeBSD : wordpress -- multiple vulnerabilities (bfcc23b6-3b27-11e6-8e82-002590263bf5)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 11825 (WordPress Prior to 4.5.3 Multiple Security Vulnerabilities).

Upgrading to version 4.5.3 eliminates this vulnerability. The upgrade is hosted for download at wordpress.org. A possible mitigation has been published immediately after the disclosure of the vulnerability. The news contains the following remark:

In addition to the security issues above, WordPress 4.5.3 fixes 17 bugs from 4.5, 4.5.1 and 4.5.2.

The vulnerability is also documented in the databases at Tenable (91840), SecurityFocus (BID 91363†) and SecurityTracker (ID 1036163†). See VDB-88099, VDB-88100, VDB-88101 and VDB-88102 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 91840
Nessus Name: FreeBSD : wordpress -- multiple vulnerabilities (bfcc23b6-3b27-11e6-8e82-002590263bf5)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 100087
OpenVAS Name: Fedora Update for wordpress FEDORA-2016-7db496f6f2
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: WordPress 4.5.3

Timelineinfo

06/18/2016 🔍
06/18/2016 +0 days 🔍
06/22/2016 +4 days 🔍
06/23/2016 +1 days 🔍
06/23/2016 +0 days 🔍
06/24/2016 +1 days 🔍
06/27/2016 +3 days 🔍
06/29/2016 +2 days 🔍
05/08/2019 +1043 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: WordPress 4.5.3 Maintenance and Security Release
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-5836 (🔍)
GCVE (CVE): GCVE-0-2016-5836
GCVE (VulDB): GCVE-100-88103
SecurityFocus: 91363 - WordPress 'oEmbed' Denial of Service Vulnerability
SecurityTracker: 1036163

See also: 🔍

Entryinfo

Created: 06/24/2016 10:52
Updated: 05/08/2019 13:10
Changes: 06/24/2016 10:52 (76), 05/08/2019 13:10 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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