Executive Summary

Summary
Title cURL: Certificate validation error
Informations
Name GLSA-201703-04 First vendor Publication 2017-03-28
Vendor Gentoo Last vendor Modification 2017-03-28
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:N/I:P/A:N)
Cvss Base Score 4 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

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.

Description

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.

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

Original Source

Url : http://security.gentoo.org/glsa/glsa-201703-04.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-295 Certificate Issues

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 136

Nessus® Vulnerability Scanner

Date Description
2017-07-25 Name : The remote host is missing a macOS or Mac OS X security update that fixes mul...
File : macosx_SecUpd2017-003.nasl - Type : ACT_GATHER_INFO
2017-03-28 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201703-04.nasl - Type : ACT_GATHER_INFO
2017-02-23 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_311e4b1cf8ee11e69940b499baebfeaf.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
3
Date Informations
2018-09-25 00:22:14
  • Multiple Updates
2018-07-29 09:21:23
  • Multiple Updates
2017-03-29 13:24:22
  • Multiple Updates
2017-03-28 05:20:20
  • First insertion