Multiple vulnerabilities in MediaWiki



| Updated: 2023-07-06
Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2023-29141
CVE-2020-36649
CWE-ID CWE-200
CWE-287
CWE-185
Exploitation vector Network
Public exploit N/A
Vulnerable software
 MediaWiki
Web applications / CMS

Vendor MediaWiki.org

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Information disclosure

EUVDB-ID: #VU74228

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-29141

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

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

The vulnerability exists due to way application handles the X-Forwarded-For header. A remote attacker can use the X-Forwarded-For header to brute-force the autoblocked IP addresses.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.35 - 1.39.2

CPE2.3 External links

http://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/6UQBHI5FWLATD7QO7DI4YS54U7XSSLAN/


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.

2) Improper Authentication

EUVDB-ID: #VU74229

Risk: Medium

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: N/A

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in OATHAuth implementation. A remote attacker can perform a replay attack when MediaWiki is configured without ObjectCache.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.35 - 1.39.2

CPE2.3
External links

http://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/6UQBHI5FWLATD7QO7DI4YS54U7XSSLAN/


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.

3) Incorrect regular expression

EUVDB-ID: #VU74226

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-2020-36649

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform regular expression denial of service (ReDoS) attack.

The vulnerability exists due to usage of a very complex regular expression in papaparse.js. A remote attacker can pass specially crafted input to the application and consume extensive system resources, resulting in a denial of service condition.

Mitigation

Install update from vendor's website.

Vulnerable software versions

MediaWiki: 1.35 - 1.39.2

CPE2.3
External links

http://lists.wikimedia.org/hyperkitty/list/mediawiki-announce@lists.wikimedia.org/thread/6UQBHI5FWLATD7QO7DI4YS54U7XSSLAN/


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.



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