Multiple vulnerabilities in MediaWiki MediaWiki

Published: 2019-07-10 | Updated: 2020-07-17

Risk	High
Patch available	YES
Number of vulnerabilities	7
CVE-ID	CVE-2019-12469 CVE-2019-12470 CVE-2019-12471 CVE-2019-12472 CVE-2019-12473 CVE-2019-12474 CVE-2019-12467
CWE-ID	CWE-284 CWE-79 CWE-20 CWE-200
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #7 is available.
Vulnerable software	MediaWiki Web applications / CMS
Vendor	MediaWiki.org

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Improper access control

EUVDB-ID: #VU30996

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-12469

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation

Update to version 1.32.2.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T222036
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

2) Improper access control

EUVDB-ID: #VU30997

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-12470

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation

Update to version 1.32.2.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T222038
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.

3) Cross-site scripting

EUVDB-ID: #VU31006

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2019-12471

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Wikimedia MediaWiki 1.30.0 through 1.32.1 has XSS. Loading user JavaScript from a non-existent account allows anyone to create the account, and perform XSS on users loading that script. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T207603
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Improper access control

EUVDB-ID: #VU31007

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12472

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to manipulate data.

An Incorrect Access Control vulnerability was found in Wikimedia MediaWiki 1.18.0 through 1.32.1. It is possible to bypass the limits on IP range blocks ($wgBlockCIDRLimit) by using the API. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T199540

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Input validation error

EUVDB-ID: #VU31008

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12473

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

Wikimedia MediaWiki 1.27.0 through 1.32.1 might allow DoS. Passing invalid titles to the API could cause a DoS by querying the entire watchlist table. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T204729
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Information disclosure

EUVDB-ID: #VU31009

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12474

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

Wikimedia MediaWiki 1.23.0 through 1.32.1 has an information leak. Privileged API responses that include whether a recent change has been patrolled may be cached publicly. Fixed in 1.32.2, 1.31.2, 1.30.2 and 1.27.6.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T212118
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Improper access control

EUVDB-ID: #VU31016

Risk: High

CVSSv4.0: 8.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2019-12467

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions. A remote attacker can send a specially crafted request and gain unauthorized access to the affected application.

Mitigation

Update to version 1.32.2.

Vulnerable software versions

MediaWiki: 1.32.0 - 1.32.1

CPE2.3

External links

https://lists.wikimedia.org/pipermail/wikitech-l/2019-June/092152.html
https://phabricator.wikimedia.org/T209794
https://seclists.org/bugtraq/2019/Jun/12
https://www.debian.org/security/2019/dsa-4460

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.