SB2023122716 - SMTP smuggling attack in Sendmail
Published: December 27, 2023
Security Bulletin ID
SB2023122716
CSH Severity
Medium
Patch available
NO
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Command Injection (CVE-ID: CVE-2023-51765)
CWE-ID: CWE-77 - Command injection
CVSSv4: 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
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.Remediation
Cybersecurity Help is not aware of any official remediation provided by the vendor.
References
- 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