CVE-2017-7468

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.

Category

4.8
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.73% Top 30%
Vendor Advisory gentoo.org Vendor Advisory haxx.se
Affected: [UNKNOWN] curl
Published at:
Updated at:

References

Link Tags
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468 third party advisory issue tracking
https://security.gentoo.org/glsa/201709-14 third party advisory vendor advisory
http://www.securitytracker.com/id/1038341 third party advisory vdb entry
https://curl.haxx.se/docs/adv_20170419.html vendor advisory
http://www.securityfocus.com/bid/97962 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2017-7468?
CVE-2017-7468 has been scored as a medium severity vulnerability.
How to fix CVE-2017-7468?
To fix CVE-2017-7468, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-7468 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2017-7468 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2017-7468?
CVE-2017-7468 affects [UNKNOWN] curl.
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