#VU76062 Incorrect Regular Expression in marked - CVE-2022-21681

Vulnerability identifier: #VU76062

Vulnerability 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-2022-21681

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
marked
Other software / Other software solutions

Vendor: Marked

Description

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

The vulnerability exists due to regular expression `inline.reflinkSearch` may cause catastrophic backtracking against some strings. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

marked: before 4.0.10

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External links
https://github.com/markedjs/marked/security/advisories/GHSA-5v2h-r2cx-5xgj
https://github.com/markedjs/marked/commit/8f806573a3f6c6b7a39b8cdb66ab5ebb8d55a5f5
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AIXDMC3CSHYW3YWVSQOXAWLUYQHAO5UX/

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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.