#VU59154 Incorrect Regular Expression in Apache James - CVE-2021-40110

Vulnerability identifier: #VU59154

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-40110

CWE-ID: CWE-185

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache James
Server applications / Mail servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote user to perform a denial of service attack.

The vulnerability exists due to improper input validation when parsing IMAP LIST commands. A remote user can send a specially crafted IMAP command to the server and perform a regular expression denial of service (ReDoS).

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache James: 2.1 - 2.1.3, 2.2.0, 2.3.0 - 2.3.2.1, 3.0 M1 - 3.0.1, 3.1.0, 3.2.0, 3.3.0, 3.4.0, 3.5.0, 3.6.0

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External links
https://seclists.org/oss-sec/2022/q1/2

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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