NVD Vulnerability Detail

CVE-2023-51765

Summary	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.
Publication Date	Dec. 24, 2023, 3:15 p.m.
Registration Date	Dec. 25, 2023, 10 a.m.
Last Update	Nov. 21, 2024, 5:38 p.m.

CVSS3.1 : MEDIUM
スコア	5.3
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
攻撃元区分(AV)	ネットワーク
攻撃条件の複雑さ(AC)	低
攻撃に必要な特権レベル(PR)	不要
利用者の関与(UI)	不要
影響の想定範囲(S)	変更なし
機密性への影響(C)	なし
完全性への影響(I)	低
可用性への影響(A)	なし

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:sendmail:sendmail::::::::					8.18.0.2

Configuration2		or higher	or less	more than	less than
cpe:2.3:o:freebsd:freebsd::::::::					11.0

Configuration3	or higher	or less	more than	less than
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*

Related information, measures and tools

No	URL	タグ
1	http://www.openwall.com/lists/oss-security/2023/12/24/1	Mailing List Third Party Advisory
2	http://www.openwall.com/lists/oss-security/2023/12/24/1	Mailing List Third Party Advisory
3	http://www.openwall.com/lists/oss-security/2023/12/25/1	Mailing List Third Party Advisory
4	http://www.openwall.com/lists/oss-security/2023/12/25/1	Mailing List Third Party Advisory
5	http://www.openwall.com/lists/oss-security/2023/12/26/5	Mailing List Third Party Advisory
6	http://www.openwall.com/lists/oss-security/2023/12/26/5	Mailing List Third Party Advisory
7	http://www.openwall.com/lists/oss-security/2023/12/29/5	Mailing List Third Party Advisory
8	http://www.openwall.com/lists/oss-security/2023/12/29/5	Mailing List Third Party Advisory
9	http://www.openwall.com/lists/oss-security/2023/12/30/1	Mailing List Third Party Advisory
10	http://www.openwall.com/lists/oss-security/2023/12/30/1	Mailing List Third Party Advisory
11	http://www.openwall.com/lists/oss-security/2023/12/30/3	Mailing List Third Party Advisory
12	http://www.openwall.com/lists/oss-security/2023/12/30/3	Mailing List Third Party Advisory
13	https://access.redhat.com/security/cve/CVE-2023-51765	Third Party Advisory
14	https://access.redhat.com/security/cve/CVE-2023-51765	Third Party Advisory
15	https://bugzilla.redhat.com/show_bug.cgi?id=2255869	Issue Tracking Third Party Advisory
16	https://bugzilla.redhat.com/show_bug.cgi?id=2255869	Issue Tracking Third Party Advisory
17	https://bugzilla.suse.com/show_bug.cgi?id=1218351	Issue Tracking Patch Third Party Advisory
18	https://bugzilla.suse.com/show_bug.cgi?id=1218351	Issue Tracking Patch Third Party Advisory
19	https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html	Technical Description
20	https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html	Technical Description
21	https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc	Patch
22	https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc	Patch
23	https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html
24	https://lists.debian.org/debian-lts-announce/2024/06/msg00004.html
25	https://lwn.net/Articles/956533/
26	https://lwn.net/Articles/956533/
27	https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/	Technical Description Third Party Advisory
28	https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/	Technical Description Third Party Advisory
29	https://www.openwall.com/lists/oss-security/2023/12/21/7	Mailing List Third Party Advisory
30	https://www.openwall.com/lists/oss-security/2023/12/21/7	Mailing List Third Party Advisory
31	https://www.openwall.com/lists/oss-security/2023/12/22/7	Mailing List Third Party Advisory
32	https://www.openwall.com/lists/oss-security/2023/12/22/7	Mailing List Third Party Advisory
33	https://www.youtube.com/watch?v=V8KPV96g1To	Exploit
34	https://www.youtube.com/watch?v=V8KPV96g1To	Exploit

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-345	データの信頼性についての不十分な検証	https://cwe.mitre.org/data/definitions/345.html

JVN Vulnerability Information

Sendmail Consortium の sendmail 等複数ベンダの製品におけるデータの信頼性についての不十分な検証に関する脆弱性

Title	Sendmail Consortium の sendmail 等複数ベンダの製品におけるデータの信頼性についての不十分な検証に関する脆弱性
Summary	Sendmail Consortium の sendmail 等複数ベンダの製品には、データの信頼性についての不十分な検証に関する脆弱性が存在します。
Possible impacts	情報を改ざんされる可能性があります。
Solution	ベンダアドバイザリまたはパッチ情報が公開されています。参考情報を参照して適切な対策を実施してください。
Publication Date	Dec. 24, 2023, midnight
Registration Date	Feb. 1, 2024, 2:34 p.m.
Last Update	Feb. 1, 2024, 2:34 p.m.

Affected System

レッドハット

Red Hat Enterprise Linux 8.0

Red Hat Enterprise Linux 9.0

Sendmail Consortium

sendmail 8.18.0.2 未満

FreeBSD

FreeBSD 11.0 未満

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2023-51765	https://www.cve.org/CVERecord?id=CVE-2023-51765
National Vulnerability Database (NVD)
2	CVE-2023-51765	https://nvd.nist.gov/vuln/detail/CVE-2023-51765

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-345	https://cwe.mitre.org/data/definitions/345.html

その他

No	Name	URL
JVN
1	JVNVU#94855660	https://jvn.jp/vu/JVNVU94855660/
関連文書
2	access.redhat.com (CVE-2023-51765)	https://access.redhat.com/security/cve/CVE-2023-51765
3	bugzilla.redhat.com (2255869)	https://bugzilla.redhat.com/show_bug.cgi?id=2255869
4	bugzilla.suse.com (1218351)	https://bugzilla.suse.com/show_bug.cgi?id=1218351
5	fahrplan.events.ccc.de (11782)	https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.html
6	github.com (5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc)	https://github.com/freebsd/freebsd-src/commit/5dd76dd0cc19450133aa379ce0ce4a68ae07fb39#diff-afdf514b32ac88004952c11660c57bc96c3d8b2234007c1cbd8d7ed7fd7935cc
7	lwn.net (Articles/956533)	https://lwn.net/Articles/956533/
8	sec-consult.com (smtp-smuggling-spoofing-e-mails-worldwide)	https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/
9	www.openwall.com (oss-security/2023/12/21/7)	https://www.openwall.com/lists/oss-security/2023/12/21/7
10	www.openwall.com (oss-security/2023/12/22/7)	https://www.openwall.com/lists/oss-security/2023/12/22/7
11	www.openwall.com (oss-security/2023/12/24/1)	http://www.openwall.com/lists/oss-security/2023/12/24/1
12	www.openwall.com (oss-security/2023/12/25/1)	http://www.openwall.com/lists/oss-security/2023/12/25/1
13	www.openwall.com (oss-security/2023/12/26/5)	http://www.openwall.com/lists/oss-security/2023/12/26/5
14	www.openwall.com (oss-security/2023/12/29/5)	http://www.openwall.com/lists/oss-security/2023/12/29/5
15	www.openwall.com (oss-security/2023/12/30/1)	http://www.openwall.com/lists/oss-security/2023/12/30/1
16	www.openwall.com (oss-security/2023/12/30/3)	http://www.openwall.com/lists/oss-security/2023/12/30/3
17	www.youtube.com (watch?v=V8KPV96g1To)	https://www.youtube.com/watch?v=V8KPV96g1To

Change Log

No	Changed Details	Date of change
1	[2024年02月01日] 掲載	Feb. 1, 2024, 2:34 p.m.