CVE-2015-6564

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2015-6564
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2015-08-24 01:59:01 UTC
Updated2026-05-27 17:16:23 UTC
DescriptionUse-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.

Risk And Classification

Primary CVSS: v3.1 7 HIGH from ADP

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.040320000 probability, percentile 0.886820000 (date 2026-06-01)

Problem Types: CWE-264 | CWE-416 | n/a | CWE-416 CWE-416 Use After Free

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7HIGHCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary6.9AV:L/AC:M/Au:N/C:C/I:C/A:C

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:L/AC:M/Au:N/C:C/I:C/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Openbsd Openssh All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[SECURITY] [DLA 1500-1] openssh security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
McAfee KnowledgeBase - Intel Security - Security Bulletin: Firewall Enterprise update fixes OpenSSH CVE-2015-5600 and CVE-2015-6564 vulnerabilities af854a3a-2127-422b-91ae-364da2661108 kc.mcafee.com
Red Hat Customer Portal af854a3a-2127-422b-91ae-364da2661108 rhn.redhat.com
OpenSSH: Multiple vulnerabilities (GLSA 201512-04) — Gentoo Security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
oss-security - Re: CVE request - OpenSSH 6.9 PAM privilege separation vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
set sshpam_ctxt to NULL after free · openssh/openssh-portable@5e75f51 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com
[SECURITY] Fedora 21 Update: openssh-6.6.1p1-16.fc21 af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Oracle Solaris Bulletin - January 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
OpenSSH PAM Support Multiple Remote Code Execution Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
www.openssh.com/txt/release-7.0 af854a3a-2127-422b-91ae-364da2661108 www.openssh.com Vendor Advisory
Full Disclosure: BFS-SA-2015-002: OpenSSH PAM Privilege Separation Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 seclists.org
[security-announce] SUSE-SU-2015:1581-1: important: Security update for af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org
cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf af854a3a-2127-422b-91ae-364da2661108 cert-portal.siemens.com
Oracle Linux Bulletin - October 2015 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Oracle Linux Bulletin - April 2016 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
Broadcom Inc. | Connecting Everything af854a3a-2127-422b-91ae-364da2661108 www.broadcom.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 591280 Siemens SCALANCE X-200RNA Switch Devices Denial of Service (DoS) Multiple Vulnerabilities (ICSA-22-349-21, SSA-412672)
  • 690300 Free Berkeley Software Distribution (FreeBSD) Security Update for openssh (2920c449-4850-11e5-825f-c80aa9043978)
© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report