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CVE-2017-7468

4.8 · MEDIUM

In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed.

Published Jul 16, 2018CWE-295EPSS 1.65%

Overview

CVE-2017-7468 is a medium-severity vulnerability. It was published on July 16, 2018 and has a CVSS 3.0 base score of 4.8 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.

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/97962Refwww.securitytracker.com/id/1038341Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468Refcurl.haxx.se/docs/adv_20170419.htmlRefsecurity.gentoo.org/glsa/201709-14Refwww.securityfocus.com/bid/97962Refwww.securitytracker.com/id/1038341Refbugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468Refcurl.haxx.se/docs/adv_20170419.htmlRefsecurity.gentoo.org/glsa/201709-14

How CyberStrike helps

Frequently asked questions

What is CVE-2017-7468?

CVE-2017-7468 is a medium-severity vulnerability. It was published on July 16, 2018 and has a CVSS 3.0 base score of 4.8 (MEDIUM).

How severe is CVE-2017-7468?

This vulnerability has a CVSS 3.0 base score of 4.8, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-7468?

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-2017-7468?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-7468 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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