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CVE-2015-6565

7.2 · HIGH

sshd in OpenSSH 6.8 and 6.9 uses world-writable permissions for TTY devices, which allows local users to cause a denial of service (terminal disruption) or possibly have unspecified other impact by…

Published Aug 24, 2015openbsdCWE-264EPSS 2.67%

Overview

CVE-2015-6565 is a high-severity vulnerability affecting openbsd openssh. It was published on August 24, 2015 and has a CVSS 2.0 base score of 7.2 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

sshd in OpenSSH 6.8 and 6.9 uses world-writable permissions for TTY devices, which allows local users to cause a denial of service (terminal disruption) or possibly have unspecified other impact by writing to a device, as demonstrated by writing an escape sequence.

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

References

Refopenwall.com/lists/oss-security/2017/01/26/2Refwww.openssh.com/txt/release-7.0Refwww.openwall.com/lists/oss-security/2015/08/22/1Refwww.securityfocus.com/bid/76497Refwww.securitytracker.com/id/1033917Refcert-portal.siemens.com/productcert/pdf/ssa-412672.pdfRefh20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05131085Refh20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888Refh20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380Refsecurity.gentoo.org/glsa/201512-04

How CyberStrike helps

Frequently asked questions

What is CVE-2015-6565?

CVE-2015-6565 is a high-severity vulnerability affecting openbsd openssh. It was published on August 24, 2015 and has a CVSS 2.0 base score of 7.2 (HIGH).

How severe is CVE-2015-6565?

This vulnerability has a CVSS 2.0 base score of 7.2, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-6565?

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-2015-6565?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-6565 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.

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