Gentoo: GLSA-201703-04: cURL: Certificate validation error
Summary
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.
Resolution
All cURL users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/curl-7.53.0"
References
[ 1 ] CVE-2017-2629 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-2629
Availability
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/201703-04
Concerns
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
Synopsis
A coding error has been found in cURL, causing the TLS Certificate Status Request extension check to always return true.
Background
cURL is a tool and libcurl is a library for transferring data with URL syntax.
Affected Packages
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/curl < 7.53.0 >= 7.53.0
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.
