#VU84797 Command Injection in Sendmail - CVE-2023-51765

Vulnerability identifier: #VU84797

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-51765

CWE-ID: CWE-77

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Sendmail

Software vendor:
Proofpoint

The vulnerability allows a remote attacker to spoof email messages.

The vulnerability exists due to an error when handling line endings other than <CR><LF>. A remote attacker can spoof contents of email message and bypass SPF protection mechanism.

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

• https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
• https://www.openwall.com/lists/oss-security/2023/12/22/7
• https://www.openwall.com/lists/oss-security/2023/12/21/7
• https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc
• http://www.openwall.com/lists/oss-security/2023/12/24/1
• http://www.openwall.com/lists/oss-security/2023/12/25/1
• https://bugzilla.suse.com/show_bug.cgi?id=1218351
• https://bugzilla.redhat.com/show_bug.cgi?id=2255869
• https://access.redhat.com/security/cve/CVE-2023-51765
• https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html
• http://www.openwall.com/lists/oss-security/2023/12/26/5