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CVE-2017-7468

Status Candidate

Overview

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.

Related Files

Gentoo Linux Security Advisory 201709-14
Posted Sep 18, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201709-14 - Multiple vulnerabilities have been found in cURL, the worst of which may allow attackers to bypass intended restrictions. Versions less than 7.55.1 are affected.

tags | advisory, vulnerability
systems | linux, gentoo
advisories | CVE-2017-1000099, CVE-2017-1000100, CVE-2017-1000101, CVE-2017-7407, CVE-2017-7468
SHA-256 | 40bb3d6b5ff32cb8c093b4d2ce2380042c6cc3679e8da56bb15ce35f4c67f98b
Download | Favorite | View
Ubuntu Security Notice USN-3262-1
Posted Apr 21, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3262-1 - It was discovered that curl incorrectly handled client certificates when resuming a TLS session. A remote attacker could use this to hijack a previously authenticated connection.

tags | advisory, remote
systems | linux, ubuntu
advisories | CVE-2017-7468
SHA-256 | 4d0f9cc1207ab7e0a120544717caa6484e9e7480b27c6d6a66b424de792e25bc
Download | Favorite | View
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