Vulnerability CVE-2015-8623

Vulnerability Name:

CVE-2015-8623 (CCN-110279)

Assigned:

2015-12-23

Published:

2015-12-23

Updated:

2017-03-27

Summary:

The User::matchEditToken function in includes/User.php in MediaWiki before 1.23.12 and 1.24.x before 1.24.5 does not perform token comparison in constant time before returning, which allows remote attackers to guess the edit token and bypass CSRF protection via a timing attack, a different vulnerability than CVE-2015-8624.

CVSS v3 Severity:

8.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): Required
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:U/RC:R)

Exploitability Metrics:	Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): None Integrity (I): Low Availibility (A): None

CVSS v2 Severity:

6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): Partial Availibility (A): None

Vulnerability Type:

CWE-352

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2015-8623

Source: CCN
Type: oss-sec Mailing List, Wed, 23 Dec 2015 14:06:58 -0500 (EST)
Re: CVE requests for MediaWiki 1.26.1, 1.25.4, 1.24.5 and 1.23.12

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20151221 CVE requests for MediaWiki 1.26.1, 1.25.4, 1.24.5 and 1.23.12

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20151223 Re: CVE requests for MediaWiki 1.26.1, 1.25.4, 1.24.5 and 1.23.12

Source: XF
Type: UNKNOWN
mediawiki-cve20158623-sec-bypass(110279)

Source: CONFIRM
Type: Issue Tracking, Third Party Advisory
https://gerrit.wikimedia.org/r/#/c/156336/5/includes/User.php

Source: MLIST
Type: Patch, Release Notes, Vendor Advisory
[MediaWiki-announce] 20151221 [MediaWiki-announce] Security Release: 1.26.1, 1.25.4, 1.24.5 and 1.23.12

Source: CONFIRM
Type: Patch, Third Party Advisory
https://phabricator.wikimedia.org/T119309

Source: CCN
Type: MediaWiki Web site
MediaWiki

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2015-8623

Vulnerable Configuration:

Configuration 1:

cpe:/a:mediawiki:mediawiki:*:*:*:*:*:*:*:* (Version <= 1.23.11)

OR cpe:/a:mediawiki:mediawiki:1.24.0:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.24.1:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.24.2:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.24.3:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.24.4:*:*:*:*:*:*:*

Configuration CCN 1:

cpe:/a:mediawiki:mediawiki:1.26.1:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.25.4:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.24.5:*:*:*:*:*:*:*

OR cpe:/a:mediawiki:mediawiki:1.23.12:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:com.ubuntu.disco:def:201586230000000	V	CVE-2015-8623 on Ubuntu 19.04 (disco) - medium.	2017-03-23
oval:com.ubuntu.artful:def:20158623000	V	CVE-2015-8623 on Ubuntu 17.10 (artful) - medium.	2017-03-23
oval:com.ubuntu.trusty:def:20158623000	V	CVE-2015-8623 on Ubuntu 14.04 LTS (trusty) - medium.	2017-03-23
oval:com.ubuntu.bionic:def:20158623000	V	CVE-2015-8623 on Ubuntu 18.04 LTS (bionic) - medium.	2017-03-23
oval:com.ubuntu.cosmic:def:201586230000000	V	CVE-2015-8623 on Ubuntu 18.10 (cosmic) - medium.	2017-03-23
oval:com.ubuntu.cosmic:def:20158623000	V	CVE-2015-8623 on Ubuntu 18.10 (cosmic) - medium.	2017-03-23
oval:com.ubuntu.bionic:def:201586230000000	V	CVE-2015-8623 on Ubuntu 18.04 LTS (bionic) - medium.	2017-03-23
oval:com.ubuntu.precise:def:20158623000	V	CVE-2015-8623 on Ubuntu 12.04 LTS (precise) - medium.	2017-03-23

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