Executive Summary

Summary
Title mod_gnutls: Certificate validation error
Informations
Name GLSA-201709-04 First vendor Publication 2017-09-17
Vendor Gentoo Last vendor Modification 2017-09-17
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:N/C:N/I:P/A:N)
Cvss Base Score 5 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A vulnerability in mod_gnutls allows remote attackers to spoof clients via crafted certificates.

Background

mod_gnutls is an extension for ​Apache's httpd. It uses the ​GnuTLS library to provide HTTPS. It supports some protocols and features that mod_ssl does not.

Description

It was discovered that the authentication hook in mod_gnutls does not validate client's certificates even when option "GnuTLSClientVerify" is set to "require".

Impact

A remote attacker could present a crafted certificate and spoof clients data.

Workaround

There is no known workaround at this time.

Resolution

All mod_gnutls users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_gnutls-0.7.3"

References

[ 1 ] CVE-2015-2091 : https://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2091

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

https://security.gentoo.org/glsa/201709-04

Original Source

Url : http://security.gentoo.org/glsa/glsa-201709-04.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-310 Cryptographic Issues

Nessus® Vulnerability Scanner

Date Description
2017-09-18 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201709-04.nasl - Type : ACT_GATHER_INFO
2015-03-26 Name : The remote Debian host is missing a security update.
File : debian_DLA-170.nasl - Type : ACT_GATHER_INFO
2015-03-11 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3177.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2017-09-19 13:25:09
  • Multiple Updates
2017-09-17 21:23:28
  • First insertion