5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.1 Medium
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
65.3%
Debian LTS Advisory DLA-3725-1 [email protected]
https://www.debian.org/lts/security/ Bastien Roucariès
January 30, 2024 https://wiki.debian.org/LTS
Package : postfix
Version : 3.4.23-0+deb10u2
CVE ID : CVE-2023-51764
Debian Bug : 1059230
Postfix, a popular mail server,
allowed SMTP smuggling unless configured with
smtpd_data_restrictions=reject_unauth_pipelining
and smtpd_discard_ehlo_keywords=chunking
(or certain other options that exist in recent versions).
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 Postfix supported <LF>.<CR><LF> but
some other popular e-mail servers do not.
To prevent attack variants (by always disallowing <LF> without <CR>),
a different solution is required, such as setting the backported
configuration option smtpd_forbid_bare_newline=yes
For Debian 10 buster, this problem has been fixed in version
3.4.23-0+deb10u2.
We recommend that you upgrade your postfix packages.
For the detailed security status of postfix please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/postfix
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | mipsel | postfix-pgsql-dbgsym | < 3.7.9-0+deb12u1+b1 | postfix-pgsql-dbgsym_3.7.9-0+deb12u1+b1_mipsel.deb |
Debian | 12 | amd64 | postfix-pcre | < 3.7.9-0+deb12u1+b1 | postfix-pcre_3.7.9-0+deb12u1+b1_amd64.deb |
Debian | 11 | mipsel | postfix-lmdb-dbgsym | < 3.5.23-0+deb11u1 | postfix-lmdb-dbgsym_3.5.23-0+deb11u1_mipsel.deb |
Debian | 11 | armel | postfix-sqlite | < 3.5.23-0+deb11u1 | postfix-sqlite_3.5.23-0+deb11u1_armel.deb |
Debian | 12 | armel | postfix-pgsql | < 3.7.9-0+deb12u1+b1 | postfix-pgsql_3.7.9-0+deb12u1+b1_armel.deb |
Debian | 11 | s390x | postfix-sqlite | < 3.5.23-0+deb11u1 | postfix-sqlite_3.5.23-0+deb11u1_s390x.deb |
Debian | 12 | armhf | postfix-ldap-dbgsym | < 3.7.9-0+deb12u1+b1 | postfix-ldap-dbgsym_3.7.9-0+deb12u1+b1_armhf.deb |
Debian | 11 | ppc64el | postfix-mysql-dbgsym | < 3.5.23-0+deb11u1 | postfix-mysql-dbgsym_3.5.23-0+deb11u1_ppc64el.deb |
Debian | 11 | s390x | postfix-mysql-dbgsym | < 3.5.23-0+deb11u1 | postfix-mysql-dbgsym_3.5.23-0+deb11u1_s390x.deb |
Debian | 11 | mipsel | postfix-ldap-dbgsym | < 3.5.23-0+deb11u1 | postfix-ldap-dbgsym_3.5.23-0+deb11u1_mipsel.deb |
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
5.1 Medium
AI Score
Confidence
High
0.003 Low
EPSS
Percentile
65.3%