#VU86899 Command Injection in Apache James - CVE-2023-51747

Vulnerability identifier: #VU86899

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-51747

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Apache James
Server applications / Mail servers

Vendor: Apache Foundation

Description

The vulnerability allows a remote attacker to perform SMTP smuggling attack.

The vulnerability exists due to improper input validation when handling email headers. A remote attacker can forge an SMTP envelop, allowing for instance to bypass SPF checks.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Apache James: 3.7.0 - 3.7.4, 3.8.0

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External links
https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
https://postfix.org/smtp-smuggling.html
https://lists.apache.org/thread/rxkwbkh9vgbl9rzx1fkllyk3krhgydko
https://www.openwall.com/lists/oss-security/2024/02/27/4

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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.