Executive Summary

Summary
Title POCO C++ Libraries NetSSL library fails to properly validate wildcard certificates
Informations
Name VU#118748 First vendor Publication 2014-04-24
Vendor VU-CERT Last vendor Modification 2014-04-24
Severity (Vendor) N/A Revision M

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:P/I:P/A:N)
Cvss Base Score 6.4 Attack Range Network
Cvss Impact Score 4.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Vulnerability Note VU#118748

POCO C++ Libraries NetSSL library fails to properly validate wildcard certificates

Original Release date: 24 Apr 2014 | Last revised: 24 Apr 2014

Overview

The POCO C++ Libraries NetSSL library fails to properly validate wildcard certificates, allowing an attacker to trick the victim application into trusting a malicious certificate.

Description

CWE-350: Reliance on Reverse DNS Resolution for a Security-Critical Action

Guenter Obiltschnig of Applied Informatics GmbH reports:

The Poco::Net::X509Certificate::verify() method in the POCO C++ Libraries NetSSL library fails to properly validate a wildcard certificate if DNS reverse mapping is broken. In case of a wildcard certificate, the class relies on DNS to obtain aliases for the host name, which are then used for matching against the wildcard domain name(s) in the certificate.

Stable release versions 1.4.6p2 and older are affected, as well as development release version 1.50 to 1.5.2.

Impact

After a successful DNS spoofing attack, the attacker may be able to trick a SSL/TLS client into successfully validating a certificate from a malicious server. However, this requires that the certificate first passes the certificate chain validation.

Solution

Apply an Update

Vendors and developers which incorporate the POCO C++ NetSSL library into their software should update to version 1.4.6p4 or later.

Vendor Information (Learn More)

VendorStatusDate NotifiedDate Updated
Applied Informatics GmbHAffected-17 Apr 2014
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

GroupScoreVector
Base6.4AV:N/AC:L/Au:N/C:P/I:P/A:N
Temporal4.7E:U/RL:OF/RC:C
Environmental1.2CDP:ND/TD:L/CR:ND/IR:ND/AR:ND

References

  • http://pocoproject.org/
  • http://pocoproject.org/download/index.html
  • https://github.com/pocoproject/

Credit

Thanks to Tuomas Siren and Alexander Berezhnoy for originally discovering the vulnerability.

This document was written by Todd Lewellen.

Other Information

  • CVE IDs:CVE-2014-0350
  • Date Public:24 Apr 2014
  • Date First Published:24 Apr 2014
  • Date Last Updated:24 Apr 2014
  • Document Revision:6

Feedback

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Original Source

Url : http://www.kb.cert.org/vuls/id/118748

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-310 Cryptographic Issues

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 4

Nessus® Vulnerability Scanner

Date Description
2016-03-04 Name : The remote Fedora host is missing a security update.
File : fedora_2016-0b3a611401.nasl - Type : ACT_GATHER_INFO
2016-03-04 Name : The remote Fedora host is missing a security update.
File : fedora_2016-4a3e5618eb.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2014-04-28 17:22:22
  • Multiple Updates
2014-04-26 13:25:59
  • Multiple Updates
2014-04-24 17:17:20
  • First insertion