Red Hat Security Advisory: postfix security update

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products74

• Red Hat Enterprise Linux AppStream (v. 9)
• postfix-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-2:3.5.25-1.el9.src as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-debuginfo-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-debuginfo-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-debuginfo-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-cdb-debuginfo-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debuginfo-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debuginfo-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debuginfo-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debuginfo-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debugsource-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debugsource-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debugsource-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-debugsource-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-debuginfo-2:3.5.25-1.el9.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-debuginfo-2:3.5.25-1.el9.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-debuginfo-2:3.5.25-1.el9.s390x as a component of Red Hat Enterprise Linux AppStream (v. 9)
• postfix-ldap-debuginfo-2:3.5.25-1.el9.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 9)
• +44 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Workaround: This flaw can be PARTIALLY mitigated via the following options in the main.cf: smtpd_data_restrictions = reject_unauth_pipelining smtpd_discard_ehlo_keywords = chunking, silent-discard Please note this only blocks the misuse of SMTP command pipelining, but does not address message pipelining nor malformed line endings. The only fix for these issues are via package updates.

🔗 References (5)

• selfhttps://access.redhat.com/errata/RHSA-2024:9243
• externalhttps://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.5_release_notes/index
• externalhttps://access.redhat.com/security/updates/classification/#moderate
• externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2255563
• selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2024/rhsa-2024_9243.json