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    CVE-2016-6309

    statem/statem.c in OpenSSL 1.1.0a does not consider memory-block movement after a realloc call, which allows remote attackers to cause a denial of service (use-after-free) or possibly execute arbitrary code via a crafted TLS session.

    Published:Sep 26, 2016
    Last Modified:Apr 12, 2025
    EPS:Sep 26, 2016
    EPSS Score:0.44973
    CVSS Score:9.8

    Affected Products

    Vendor
    Openssl
    Product
    Openssl

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    CVE-2026-63074 (CVSS 5.9) — Issue summary: The OpenSSL Certificate Management Protocol (CMP) caches additional certificates (extraCerts) s…
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    References

    http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
    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.securityfocus.com/bid/93177
    http://www.securitytracker.com/id/1036885
    https://bto.bluecoat.com/security-advisory/sa132
    https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
    https://www.openssl.org/news/secadv/20160926.txt
    https://www.tenable.com/security/tns-2016-16
    https://www.tenable.com/security/tns-2016-20
    http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10759
    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.securityfocus.com/bid/93177
    http://www.securitytracker.com/id/1036885
    https://bto.bluecoat.com/security-advisory/sa132
    https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=acacbfa7565c78d2273c0b2a2e5e803f44afefeb
    https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03856en_us
    https://www.openssl.org/news/secadv/20160926.txt
    https://www.tenable.com/security/tns-2016-16
    https://www.tenable.com/security/tns-2016-20

    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