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    CVE-2016-2179

    The DTLS implementation in OpenSSL before 1.1.0 does not properly restrict the lifetime of queue entries associated with unused out-of-order messages, which allows remote attackers to cause a denial of service (memory consumption) by maintaining many crafted DTLS sessions simultaneously, related to d1_lib.c, statem_dtls.c, statem_lib.c, and statem_srvr.c.

    Published:Jun 30, 2016
    Last Modified:Apr 12, 2025
    EPS:Sep 16, 2016
    EPSS Score:0.19472
    CVSS Score:7.5

    Affected Products

    Vendor
    Openssl
    Product
    Openssl
    Vendor
    Oracle
    Product
    Linux
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-469 HTTP DoS

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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…
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    References

    http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
    http://rhn.redhat.com/errata/RHSA-2016-1940.html
    http://www-01.ibm.com/support/docview.wss?uid=swg21995039
    http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
    http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
    http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
    http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
    http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
    http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
    http://www.securityfocus.com/bid/92987
    http://www.securitytracker.com/id/1036689
    http://www.splunk.com/view/SP-CAAAPSV
    http://www.splunk.com/view/SP-CAAAPUE
    https://bto.bluecoat.com/security-advisory/sa132
    https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
    https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=f5c7f5dfbaf0d2f7d946d0fe86f08e6bcb36ed0d
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
    https://www.tenable.com/security/tns-2016-16
    https://www.tenable.com/security/tns-2016-20
    https://www.tenable.com/security/tns-2016-21
    http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
    http://rhn.redhat.com/errata/RHSA-2016-1940.html
    http://www-01.ibm.com/support/docview.wss?uid=swg21995039
    http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
    http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
    http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
    http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html
    http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
    http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
    http://www.oracle.com/technetwork/topics/security/ovmbulletinoct2016-3090547.html
    http://www.securityfocus.com/bid/92987
    http://www.securitytracker.com/id/1036689
    http://www.splunk.com/view/SP-CAAAPSV
    http://www.splunk.com/view/SP-CAAAPUE
    https://bto.bluecoat.com/security-advisory/sa132
    https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
    https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=f5c7f5dfbaf0d2f7d946d0fe86f08e6bcb36ed0d
    https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA40312
    https://security.FreeBSD.org/advisories/FreeBSD-SA-16:26.openssl.asc
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
    https://www.tenable.com/security/tns-2016-16
    https://www.tenable.com/security/tns-2016-20
    https://www.tenable.com/security/tns-2016-21

    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