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CVE-2017-2624

5.9 · MEDIUM

It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies.

Published Jul 27, 2018CWE-385EPSS 0.70%

Overview

CVE-2017-2624 is a medium-severity vulnerability. It was published on July 27, 2018 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

It was found that xorg-x11-server before 1.19.0 including uses memcmp() to check the received MIT cookie against a series of valid cookies. If the cookie is correct, it is allowed to attach to the Xorg session. Since most memcmp() implementations return after an invalid byte is seen, this causes a time difference between a valid and invalid byte, which could allow an efficient brute force attack.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refwww.securityfocus.com/bid/96480Refwww.securitytracker.com/id/1037919Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2624Refgitlab.freedesktop.org/xorg/xserver/commit/d7ac755f0b618eb1259d93c8a16ec6e39a18627cReflists.debian.org/debian-lts-announce/2017/11/msg00032.htmlRefsecurity.gentoo.org/glsa/201704-03Refsecurity.gentoo.org/glsa/201710-30Refwww.x41-dsec.de/lab/advisories/x41-2017-001-xorg/Refwww.securityfocus.com/bid/96480Refwww.securitytracker.com/id/1037919

How CyberStrike helps

Frequently asked questions

What is CVE-2017-2624?

CVE-2017-2624 is a medium-severity vulnerability. It was published on July 27, 2018 and has a CVSS 3.0 base score of 5.9 (MEDIUM).

How severe is CVE-2017-2624?

This vulnerability has a CVSS 3.0 base score of 5.9, rated MEDIUM. 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-2017-2624?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2017-2624?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-2624 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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