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    CVE-2014-3511

    The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by triggering ClientHello message fragmentation in communication between a client and server that both support later TLS versions, related to a "protocol downgrade" issue.

    Published:Aug 6, 2014
    Last Modified:Apr 12, 2025
    EPS:Aug 13, 2014
    EPSS Score:0.06952
    CVSS Score:4.3

    Affected Products

    Vendor
    Openssl
    Product
    Openssl
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhev Manager
    Vendor
    Redhat
    Product
    Storage

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-63072 (CVSS 7.5) — Issue summary: OpenSSL CMS decryption sizes the key-unwrap output buffer based on querying the unwrapped key s…
    CVE-2026-54874 (CVSS 7.5) — Issue summary: Receiving a DTLS record for a future epoch while a handshake is in progress causes OpenSSL to b…
    CVE-2026-14457 (CVSS 7.5) — Issue summary: In a server or client configuration with RFC7250 Raw Public Keys (RPKs) enabled, and only the p…
    CVE-2026-63076 (CVSS 7.5) — Issue summary: OpenSSL CMP password based protection verification only checks whether the protectionAlg parame…
    CVE-2026-63074 (CVSS 5.9) — Issue summary: The OpenSSL Certificate Management Protocol (CMP) caches additional certificates (extraCerts) s…
    CVE-2026-63073 (CVSS 9.8) — Issue summary: OpenSSL CMP response validation passed an unexpected response sender distinguished name directl…
    CVE-2026-18798 (CVSS 7.5) — Issue summary: QUIC server may double free QRX (QUIC record layer RX) object when channel creation fails for i…
    CVE-2026-14456 (CVSS 7.5) — Issue summary: When an OpenSSL QUIC server (Listener SSL object) processes valid QUIC Initial packets for unkn…

    References

    ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-008.txt.asc
    http://aix.software.ibm.com/aix/efixes/security/openssl_advisory10.asc
    http://linux.oracle.com/errata/ELSA-2014-1052.html
    http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136470.html
    http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.html
    http://lists.opensuse.org/opensuse-updates/2014-08/msg00036.html
    http://marc.info/?l=bugtraq&m=142350350616251&w=2
    http://marc.info/?l=bugtraq&m=142495837901899&w=2
    http://marc.info/?l=bugtraq&m=142624590206005&w=2
    http://marc.info/?l=bugtraq&m=142660345230545&w=2
    http://marc.info/?l=bugtraq&m=142791032306609&w=2
    http://marc.info/?l=bugtraq&m=143290437727362&w=2
    http://marc.info/?l=bugtraq&m=143290522027658&w=2
    http://rhn.redhat.com/errata/RHSA-2015-0126.html
    http://rhn.redhat.com/errata/RHSA-2015-0197.html
    http://secunia.com/advisories/58962
    http://secunia.com/advisories/59700
    http://secunia.com/advisories/59710
    http://secunia.com/advisories/59756
    http://secunia.com/advisories/59887
    http://secunia.com/advisories/60022
    http://secunia.com/advisories/60221
    http://secunia.com/advisories/60377
    http://secunia.com/advisories/60493
    http://secunia.com/advisories/60684
    http://secunia.com/advisories/60803
    http://secunia.com/advisories/60810
    http://secunia.com/advisories/60890
    http://secunia.com/advisories/60917
    http://secunia.com/advisories/60921
    http://secunia.com/advisories/60938
    http://secunia.com/advisories/61017
    http://secunia.com/advisories/61043
    http://secunia.com/advisories/61100
    http://secunia.com/advisories/61139
    http://secunia.com/advisories/61184
    http://secunia.com/advisories/61775
    http://secunia.com/advisories/61959
    http://security.gentoo.org/glsa/glsa-201412-39.xml
    http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15564.html
    http://www-01.ibm.com/support/docview.wss?uid=nas8N1020240
    http://www-01.ibm.com/support/docview.wss?uid=swg21682293
    http://www-01.ibm.com/support/docview.wss?uid=swg21683389
    http://www-01.ibm.com/support/docview.wss?uid=swg21686997
    http://www.arubanetworks.com/support/alerts/aid-08182014.txt
    http://www.debian.org/security/2014/dsa-2998
    http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-372998.htm
    http://www.securityfocus.com/bid/69079
    http://www.securitytracker.com/id/1030693
    http://www.splunk.com/view/SP-CAAANHS
    http://www.tenable.com/security/tns-2014-06
    https://bugzilla.redhat.com/show_bug.cgi?id=1127504
    https://exchange.xforce.ibmcloud.com/vulnerabilities/95162
    https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=280b1f1ad12131defcd986676a8fc9717aaa601b
    https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
    https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
    https://kc.mcafee.com/corporate/index?page=content&id=SB10084
    https://lists.balabit.hu/pipermail/syslog-ng-announce/2014-September/000196.html
    https://support.citrix.com/article/CTX216642
    https://techzone.ergon.ch/CVE-2014-3511
    https://www.freebsd.org/security/advisories/FreeBSD-SA-14:18.openssl.asc
    https://www.openssl.org/news/secadv_20140806.txt
    ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-008.txt.asc
    http://aix.software.ibm.com/aix/efixes/security/openssl_advisory10.asc
    http://linux.oracle.com/errata/ELSA-2014-1052.html
    http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136470.html
    http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.html
    http://lists.opensuse.org/opensuse-updates/2014-08/msg00036.html
    http://marc.info/?l=bugtraq&m=142350350616251&w=2
    http://marc.info/?l=bugtraq&m=142495837901899&w=2
    http://marc.info/?l=bugtraq&m=142624590206005&w=2
    http://marc.info/?l=bugtraq&m=142660345230545&w=2
    http://marc.info/?l=bugtraq&m=142791032306609&w=2
    http://marc.info/?l=bugtraq&m=143290437727362&w=2
    http://marc.info/?l=bugtraq&m=143290522027658&w=2
    http://rhn.redhat.com/errata/RHSA-2015-0126.html
    http://rhn.redhat.com/errata/RHSA-2015-0197.html
    http://secunia.com/advisories/58962
    http://secunia.com/advisories/59700
    http://secunia.com/advisories/59710
    http://secunia.com/advisories/59756
    http://secunia.com/advisories/59887
    http://secunia.com/advisories/60022
    http://secunia.com/advisories/60221
    http://secunia.com/advisories/60377
    http://secunia.com/advisories/60493
    http://secunia.com/advisories/60684
    http://secunia.com/advisories/60803
    http://secunia.com/advisories/60810
    http://secunia.com/advisories/60890
    http://secunia.com/advisories/60917
    http://secunia.com/advisories/60921
    http://secunia.com/advisories/60938
    http://secunia.com/advisories/61017
    http://secunia.com/advisories/61043
    http://secunia.com/advisories/61100
    http://secunia.com/advisories/61139
    http://secunia.com/advisories/61184
    http://secunia.com/advisories/61775
    http://secunia.com/advisories/61959
    http://security.gentoo.org/glsa/glsa-201412-39.xml
    http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15564.html
    http://www-01.ibm.com/support/docview.wss?uid=nas8N1020240
    http://www-01.ibm.com/support/docview.wss?uid=swg21682293
    http://www-01.ibm.com/support/docview.wss?uid=swg21683389
    http://www-01.ibm.com/support/docview.wss?uid=swg21686997
    http://www.arubanetworks.com/support/alerts/aid-08182014.txt
    http://www.debian.org/security/2014/dsa-2998
    http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-372998.htm
    http://www.securityfocus.com/bid/69079
    http://www.securitytracker.com/id/1030693
    http://www.splunk.com/view/SP-CAAANHS
    http://www.tenable.com/security/tns-2014-06
    https://bugzilla.redhat.com/show_bug.cgi?id=1127504
    https://exchange.xforce.ibmcloud.com/vulnerabilities/95162
    https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commit%3Bh=280b1f1ad12131defcd986676a8fc9717aaa601b
    https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
    https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
    https://kc.mcafee.com/corporate/index?page=content&id=SB10084
    https://lists.balabit.hu/pipermail/syslog-ng-announce/2014-September/000196.html
    https://support.citrix.com/article/CTX216642
    https://techzone.ergon.ch/CVE-2014-3511
    https://www.freebsd.org/security/advisories/FreeBSD-SA-14:18.openssl.asc
    https://www.openssl.org/news/secadv_20140806.txt

    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