CVE-2017-7468
mediumpriority · track · 31EPSS 0.017 · 76 %ileEUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.8–7.5
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (2)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- CURL-CVE-2017-7468TLS session resumption client cert bypass (again)2017-04-19vendor · osvUS
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 could not be kept alive to make the next handshake faster. This flaw is a regression and identical to [CVE-2016-5419](https://curl.se/docs/CVE-2016-5419.html) reported on August 3rd 2016, but affecting a different version range.
also known as (3)
Other names and identifiers for this entity.
sources
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references (15)
External citations — patches, advisories, analysis.
- http://www.securitytracker.com/id/1038341cnnvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468cnnvd
- https://curl.haxx.se/docs/adv_20170419.htmlcnnvd
- https://security.gentoo.org/glsa/201709-14cnnvd
- https://www.securityfocus.com/bid/97962cnnvd
- http://www.securityfocus.com/bid/97962enisa_euvd
- http://www.securitytracker.com/id/1038341enisa_euvd
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468enisa_euvd
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