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    CVE-2011-0411

    The STARTTLS implementation in Postfix 2.4.x before 2.4.16, 2.5.x before 2.5.12, 2.6.x before 2.6.9, and 2.7.x before 2.7.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack.

    Published:Mar 5, 2011
    Last Modified:Apr 11, 2025
    EPS:Mar 16, 2011
    EPSS Score:0.6945
    CVSS Score:6.8

    Affected Products

    Vendor
    Postfix
    Product
    Postfix
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    http://www.postfix.org/CVE-2011-0411.htmlhttp://www.postfix.org/CVE-2011-0411.html

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-43964 (CVSS 3.7) — Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and proce…
    CVE-2023-51764 (CVSS 5.3) — Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipel…
    CVE-2020-12063 (CVSS 5.3) — A certain Postfix 2.10.1-7 package could allow an attacker to send an email from an arbitrary-looking sender v…
    CVE-2017-10140 (CVSS 7.8) — Postfix before 2.11.10, 3.0.x before 3.0.10, 3.1.x before 3.1.6, and 3.2.x before 3.2.2 might allow local user…
    CVE-2012-0811 (CVSS 6.5) — Multiple SQL injection vulnerabilities in Postfix Admin (aka postfixadmin) before 2.3.5 allow remote authentic…
    CVE-2011-1720 (CVSS 6.8) — The SMTP server in Postfix before 2.5.13, 2.6.x before 2.6.10, 2.7.x before 2.7.4, and 2.8.x before 2.8.3, whe…
    CVE-2009-2939 (CVSS 6.9) — The postfix.postinst script in the Debian GNU/Linux and Ubuntu postfix 2.5.5 package grants the postfix user w…
    CVE-2008-4977 (CVSS 6.9) — postfix_groups.pl in Postfix 2.5.2 allows local users to overwrite arbitrary files via a symlink attack on the…
    CVE-2008-3889 (CVSS 2.1) — Postfix 2.4 before 2.4.9, 2.5 before 2.5.5, and 2.6 before 2.6-20080902, when used with the Linux 2.6 kernel, …
    CVE-2008-2937 (CVSS 1.9) — Postfix 2.5 before 2.5.4 and 2.6 before 2.6-20080814 delivers to a mailbox file even when this file is not own…

    References

    http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
    http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056559.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056560.html
    http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
    http://secunia.com/advisories/43646
    http://secunia.com/advisories/43874
    http://security.gentoo.org/glsa/glsa-201206-33.xml
    http://securitytracker.com/id?1025179
    http://support.apple.com/kb/HT5002
    http://www.debian.org/security/2011/dsa-2233
    http://www.kb.cert.org/vuls/id/555316
    http://www.kb.cert.org/vuls/id/MORO-8ELH6Z
    http://www.openwall.com/lists/oss-security/2021/08/10/2
    http://www.oracle.com/technetwork/topics/security/cpuapr2011-301950.html
    http://www.osvdb.org/71021
    http://www.postfix.org/CVE-2011-0411.html
    http://www.redhat.com/support/errata/RHSA-2011-0422.html
    http://www.redhat.com/support/errata/RHSA-2011-0423.html
    http://www.securityfocus.com/bid/46767
    http://www.vupen.com/english/advisories/2011/0611
    http://www.vupen.com/english/advisories/2011/0752
    http://www.vupen.com/english/advisories/2011/0891
    https://exchange.xforce.ibmcloud.com/vulnerabilities/65932
    http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10705
    http://lists.apple.com/archives/Security-announce/2011//Oct/msg00003.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056559.html
    http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056560.html
    http://lists.opensuse.org/opensuse-security-announce/2011-05/msg00005.html
    http://secunia.com/advisories/43646
    http://secunia.com/advisories/43874
    http://security.gentoo.org/glsa/glsa-201206-33.xml
    http://securitytracker.com/id?1025179
    http://support.apple.com/kb/HT5002
    http://www.debian.org/security/2011/dsa-2233
    http://www.kb.cert.org/vuls/id/555316
    http://www.kb.cert.org/vuls/id/MORO-8ELH6Z
    http://www.openwall.com/lists/oss-security/2021/08/10/2
    http://www.oracle.com/technetwork/topics/security/cpuapr2011-301950.html
    http://www.osvdb.org/71021
    http://www.postfix.org/CVE-2011-0411.html
    http://www.redhat.com/support/errata/RHSA-2011-0422.html
    http://www.redhat.com/support/errata/RHSA-2011-0423.html
    http://www.securityfocus.com/bid/46767
    http://www.vupen.com/english/advisories/2011/0611
    http://www.vupen.com/english/advisories/2011/0752
    http://www.vupen.com/english/advisories/2011/0891
    https://exchange.xforce.ibmcloud.com/vulnerabilities/65932

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High