CVE-2015-6564

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    CVE-2015-6564

    Published: 24 Aug 2015Last Modified: 10 Apr 2026

    Summary:

    Details: Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.

    References: http://rhn.redhat.com/errata/RHSA-2016-0741.html, http://www.openssh.com/txt/release-7.0, https://security.gentoo.org/glsa/201512-04, https://www.broadcom.com/support/fibre-channel-networking/security-advisories/brocade-security-advisory-2019-764, https://github.com/openssh/openssh-portable/commit/5e75f5198769056089fb06c4d738ab0e5abc66f7, http://lists.fedoraproject.org/pipermail/package-announce/2015-August/165170.html, http://lists.opensuse.org/opensuse-security-announce/2015-09/msg00017.html, http://seclists.org/fulldisclosure/2015/Aug/54, http://www.openwall.com/lists/oss-security/2015/08/22/1, http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html, http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html, http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html, http://www.securityfocus.com/bid/76317, https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf, https://kc.mcafee.com/corporate/index?page=content&id=SB10136, https://lists.debian.org/debian-lts-announce/2018/09/msg00010.html

    Affected packages

    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
    CVE-2015-6564 | CVE-DB