CVE-2023-51765
Last modified
CVE-2023-51765 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. sendmail through 8.17.2 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. EPSS estimates a 1.07% chance of exploitation in the next 30 days.
Description
sendmail through 8.17.2 allows SMTP smuggling in certain configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because sendmail supports <LF>.<CR><LF> but some other popular e-mail servers do not. This is resolved in 8.18 and later versions with 'o' in srv_features.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Sendmail | Sendmail | < 8.18.0.2 |
| Freebsd | Freebsd | < 11.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
References
- http://www.openwall.com/lists/oss-security/2023/12/24/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/25/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/26/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/29/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/3Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-51765Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1218351Issue Tracking, Patch, Third Party Advisory
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.htmlTechnical Description
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/Technical Description, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/21/7Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/22/7Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/24/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/25/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/26/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/29/5Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2023/12/30/3Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2023-51765Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2255869Issue Tracking, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1218351Issue Tracking, Patch, Third Party Advisory
- https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.htmlTechnical Description
- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/Technical Description, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/21/7Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2023/12/22/7Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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