Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2015-6563

6.4 · MEDIUM

The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation…

Published Aug 24, 2015openbsdCWE-20EPSS 0.38%

Overview

CVE-2015-6563 is a medium-severity vulnerability affecting openbsd openssh. It was published on August 24, 2015 and has a CVSS 3.1 base score of 6.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.

Remediation

Check the references section for vendor advisories and patches from openbsd. Update openssh to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
openbsdopenssh0Affected
applemac_os_x0Affected

References

Reflists.apple.com/archives/security-announce/2015/Oct/msg00005.htmlReflists.fedoraproject.org/pipermail/package-announce/2015-August/165170.htmlReflists.opensuse.org/opensuse-security-announce/2015-09/msg00017.htmlRefrhn.redhat.com/errata/RHSA-2016-0741.htmlRefseclists.org/fulldisclosure/2015/Aug/54Refwww.openssh.com/txt/release-7.0Refwww.openwall.com/lists/oss-security/2015/08/22/1Refwww.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.htmlRefwww.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlRefwww.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html

How CyberStrike helps

Frequently asked questions

What is CVE-2015-6563?

CVE-2015-6563 is a medium-severity vulnerability affecting openbsd openssh. It was published on August 24, 2015 and has a CVSS 3.1 base score of 6.4 (MEDIUM).

How severe is CVE-2015-6563?

This vulnerability has a CVSS 3.1 base score of 6.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2015-6563?

Check the references section for vendor advisories and patches from openbsd. Update openssh to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2015-6563?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-6563 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related MEDIUM CVEs from 2015

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999