GLSA-201703-04 : cURL: Certificate validation error

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-201703-04
(cURL: Certificate validation error)

cURL and applications linked against libcurl support “OCSP
stapling”, also known as the TLS Certificate Status Request extension
(using the CURLOPT_SSL_VERIFYSTATUS option). When telling cURL to use
this feature, it uses that TLS extension to ask for a fresh proof of the
server’s certificate’s validity. If the server doesn’t support the
extension, or fails to provide said proof, cURL is expected to return an
error.
Due to a coding mistake, the code that checks for a test success or
failure, ends up always thinking there’s valid proof, even when there
is none or if the server doesn’t support the TLS extension in question.

Impact :

Due to the error, a user maybe does not detect when a server’s
certificate goes invalid or otherwise be mislead that the server is in a
better shape than it is in reality.

Workaround :

There is no known workaround at this time.

See also :

https://security.gentoo.org/glsa/201703-04

Solution :

All cURL users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-misc/curl-7.53.0'

Risk factor :

Medium

Family: Gentoo Local Security Checks

Nessus Plugin ID: 99011 ()

Bugtraq ID:

CVE ID: CVE-2017-2629

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