Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Haxx | Libcurl | >= 7.52.0, <= 7.53.1 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/97962Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038341Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468Issue TrackingThird Party Advisory
- https://curl.haxx.se/docs/adv_20170419.htmlVendor Advisory
- https://security.gentoo.org/glsa/201709-14Third Party Advisory
- http://www.securityfocus.com/bid/97962Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1038341Third Party AdvisoryVDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468Issue TrackingThird Party Advisory
- https://curl.haxx.se/docs/adv_20170419.htmlVendor Advisory
- https://security.gentoo.org/glsa/201709-14Third Party Advisory
FAQ
What is CVE-2017-7468?
CVE-2017-7468 is a vulnerability with a CVSS score of 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. That is unacceptable since a server by specification is al...
How severe is CVE-2017-7468?
CVE-2017-7468 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-7468?
Check the references section above for vendor advisories and patch information. Affected products include: Haxx Libcurl.