Denial of service in Mpmath

1) Incorrect Regular Expression

EUVDB-ID: #VU101870

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-2021-29063

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

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

The vulnerability exists due to insufficient input validation when processing regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

mpmath: 1.0.0 - 1.2.1

CPE2.3

• cpe:2.3:a:mpmath:mpmath:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:mpmath:mpmath:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mpmath:mpmath:1.2.0:*:*:*:*:*:*:*

External links

https://github.com/npm/hosted-git-info/pull/76
https://github.com/yetingli/PoCs/blob/main/CVE-2021-29063/Mpmath.md
https://github.com/yetingli/SaveResults/blob/main/js/hosted-git-info.js
https://www.npmjs.com/package/hosted-git-info
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3M5O55E7VUDMXCPQR6MQTOIFDKHP36AA/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MS2U6GLXQSRZJE2HVUAUMVFR2DWQLCZG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EIUX3XWY2K3MSO7QXMZXQQYAURARSPC5/
https://github.com/fredrik-johansson/mpmath/commit/46d44c3c8f3244017fe1eb102d564eb4ab8ef750
https://github.com/mpmath/mpmath/releases/tag/1.3.0

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.