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7.2	$0-$5k	0.00

A vulnerability was found in WordPress (Content Management System). It has been declared as critical. Affected by this vulnerability is some unknown processing of the file wp-includes/ms-functions.php of the component Multisite API. The manipulation with an unknown input leads to a cryptographic issues vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

wp-includes/ms-functions.php in the Multisite WordPress API in WordPress before 4.7.1 does not properly choose random numbers for keys, which makes it easier for remote attackers to bypass intended access restrictions via a crafted (1) site signup or (2) user signup.

The bug was discovered 01/11/2017. The weakness was presented 01/15/2017 (oss-sec). The advisory is shared at openwall.com. This vulnerability is known as CVE-2017-5493 since 01/14/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

By approaching the search of inurl:wp-includes/ms-functions.php it is possible to find vulnerable targets with Google Hacking. The vulnerability scanner Nessus provides a plugin with the ID 96606 (WordPress < 4.7.1 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175955 (Debian Security Update for wordpress (DSA 3779-1)).

Upgrading to version 3.7.17, 3.8.17, 3.9.15, 4.0.14, 4.1.14, 4.2.11, 4.3.7, 4.4.6, 4.5.5, 4.6.2 or 4.7.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (96606). See 95347, 95348, 95349 and 95350 for similar entries.

Productinfo

Type

• Content Management System

Name

• WordPress

Version

• 3.0
• 3.0 Beta1
• 3.0 Beta2
• 3.0 rc1
• 3.0 rc2
• 3.0 rc3
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5
• 3.0.6
• 3.1
• 3.1 Beta1
• 3.1 Beta2
• 3.1 rc1
• 3.1 rc2
• 3.1 rc3
• 3.1 rc4
• 3.1.1
• 3.1.1 rc1
• 3.1.2
• 3.1.3
• 3.1.4
• 3.2
• 3.2 Beta1
• 3.2 Beta2
• 3.2 rc1
• 3.2 rc2
• 3.2 rc3
• 3.2.1
• 3.3
• 3.3 Beta1
• 3.3 Beta2
• 3.3 Beta3
• 3.3 Beta4
• 3.3 rc1
• 3.3 rc2
• 3.3 rc3
• 3.3.1
• 3.3.2
• 3.3.2 rc1
• 3.3.3
• 3.4
• 3.4 Beta1
• 3.4 Beta2
• 3.4 Beta3
• 3.4 Beta4
• 3.4 rc1
• 3.4 rc2
• 3.4 rc3
• 3.4 rc4
• 3.4.0
• 3.4.1
• 3.4.2
• 3.5
• 3.5 Beta1
• 3.5 Beta2
• 3.5 Beta3
• 3.5 rc1
• 3.5 rc2
• 3.5 rc3
• 3.5 rc4
• 3.5.0
• 3.5.1
• 3.5.2
• 3.6
• 3.6 Beta1
• 3.6 Beta2
• 3.6 Beta3
• 3.6 Beta4
• 3.6 rc1
• 3.6 rc2
• 3.6.1
• 3.7
• 3.7 Beta1
• 3.7 Beta2
• 3.7 rc1
• 3.7 rc2
• 3.7.1
• 3.7.2
• 3.7.3
• 3.7.4
• 3.7.5
• 3.7.6
• 3.7.7
• 3.7.8
• 3.7.9
• 3.7.10
• 3.7.11
• 3.7.12
• 3.7.13
• 3.7.14
• 3.7.15
• 3.7.16
• 3.8
• 3.8 Beta1
• 3.8 rc1
• 3.8 rc2
• 3.8.1
• 3.8.1 rc1
• 3.8.2
• 3.8.3
• 3.8.4
• 3.8.5
• 3.8.6
• 3.8.7
• 3.8.8
• 3.8.9
• 3.8.10
• 3.8.11
• 3.8.12
• 3.8.13
• 3.8.14
• 3.8.15
• 3.8.16
• 3.9
• 3.9 Beta1
• 3.9 Beta2
• 3.9 Beta3
• 3.9 rc1
• 3.9 rc2
• 3.9.0
• 3.9.1
• 3.9.1 rc1
• 3.9.2
• 3.9.3
• 3.9.4
• 3.9.5
• 3.9.6
• 3.9.7
• 3.9.8
• 3.9.9
• 3.9.10
• 3.9.11
• 3.9.12
• 3.9.13
• 3.9.14
• 4.0
• 4.0 Beta1
• 4.0 Beta2
• 4.0 Beta3
• 4.0 Beta4
• 4.0 rc1
• 4.0 rc2
• 4.0.1
• 4.0.2
• 4.0.3
• 4.0.4
• 4.0.5
• 4.0.6
• 4.0.7
• 4.0.8
• 4.0.9
• 4.0.10
• 4.0.11
• 4.0.12
• 4.0.13
• 4.1
• 4.1 Beta1
• 4.1 Beta2
• 4.1 rc1
• 4.1 rc2
• 4.1 rc3
• 4.1.1
• 4.1.2
• 4.1.3
• 4.1.4
• 4.1.5
• 4.1.6
• 4.1.7
• 4.1.8
• 4.1.9
• 4.1.10
• 4.1.11
• 4.1.12
• 4.1.13
• 4.2
• 4.2 Beta1
• 4.2 Beta2
• 4.2 Beta3
• 4.2 Beta4
• 4.2 rc1
• 4.2 rc2
• 4.2 rc3
• 4.2 rc4
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.4 rc1
• 4.2.5
• 4.2.6
• 4.2.7
• 4.2.8
• 4.2.9
• 4.2.10
• 4.3
• 4.3 Beta1
• 4.3 Beta2
• 4.3 Beta3
• 4.3 Beta4
• 4.3 rc1
• 4.3 rc2
• 4.3 rc3
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.4
• 4.4 Beta1
• 4.4 Beta2
• 4.4 Beta3
• 4.4 Beta4
• 4.4 rc1
• 4.4.0
• 4.4.1
• 4.4.2
• 4.4.3
• 4.4.4
• 4.4.5
• 4.5
• 4.5 Beta1
• 4.5 Beta2
• 4.5 Beta3
• 4.5 Beta4
• 4.5 rc1
• 4.5 rc2
• 4.5 rc3
• 4.5.1
• 4.5.1 rc1
• 4.5.1 rc2
• 4.5.2
• 4.5.3
• 4.5.4
• 4.6
• 4.6 Beta1
• 4.6 Beta2
• 4.6 Beta3
• 4.6 Beta4
• 4.6 rc1
• 4.6 rc2
• 4.6 rc3
• 4.6 rc4
• 4.6.1
• 4.7

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

Video

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Cryptographic issues
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍
Google Hack: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 96606
Nessus Name: WordPress < 4.7.1 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703779
OpenVAS Name: Debian Security Advisory DSA 3779-1 (wordpress - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: WordPress 3.7.17/3.8.17/3.9.15/4.0.14/4.1.14/4.2.11/4.3.7/4.4.6/4.5.5/4.6.2/4.7.1
Patch: github.com

Timelineinfo

01/11/2017 🔍
01/11/2017 +0 days 🔍
01/12/2017 +1 days 🔍
01/14/2017 +2 days 🔍
01/14/2017 +0 days 🔍
01/15/2017 +1 days 🔍
01/15/2017 +0 days 🔍
01/18/2017 +3 days 🔍
11/01/2022 +2113 days 🔍

Sourcesinfo

Product: wordpress.com

Advisory: cea9e2dc62abf777e06b12ec4ad9d1aaa49b29f4
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-5493 (🔍)
OVAL: 🔍

SecurityTracker: 1037591
SecurityFocus: 95401 - WordPress Cryptographic Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 01/15/2017 10:40
Updated: 11/01/2022 07:32
Changes: 01/15/2017 10:40 (79), 06/08/2020 09:02 (3), 11/01/2022 07:26 (6), 11/01/2022 07:32 (1)
Complete: 🔍

Discussion

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