Executive Summary

Summary
Title GnuTLS vulnerabilities
Informations
Name USN-2540-1 First vendor Publication 2015-03-23
Vendor Ubuntu Last vendor Modification 2015-03-23
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

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.10 - Ubuntu 14.04 LTS - Ubuntu 12.04 LTS - Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in GnuTLS.

Software Description: - gnutls28: GNU TLS library - gnutls26: GNU TLS library

Details:

It was discovered that GnuTLS did not perform date and time checks on CA certificates, contrary to expectations. This issue only affected Ubuntu 10.04 LTS. (CVE-2014-8155)

Nikos Mavrogiannopoulos discovered that GnuTLS incorrectly verified that signature algorithms matched. A remote attacker could possibly use this issue to downgrade to a disallowed algorithm. This issue only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-0282)

It was discovered that GnuTLS incorrectly verified certificate algorithms. A remote attacker could possibly use this issue to downgrade to a disallowed algorithm. (CVE-2015-0294)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 14.10:
libgnutls-deb0-28 3.2.16-1ubuntu2.2

Ubuntu 14.04 LTS:
libgnutls26 2.12.23-12ubuntu2.2

Ubuntu 12.04 LTS:
libgnutls26 2.12.14-5ubuntu3.9

Ubuntu 10.04 LTS:
libgnutls26 2.8.5-2ubuntu0.7

In general, a standard system update will make all the necessary changes.

References:
http://www.ubuntu.com/usn/usn-2540-1
CVE-2014-8155, CVE-2015-0282, CVE-2015-0294

Package Information:
https://launchpad.net/ubuntu/+source/gnutls28/3.2.16-1ubuntu2.2
https://launchpad.net/ubuntu/+source/gnutls26/2.12.23-12ubuntu2.2
https://launchpad.net/ubuntu/+source/gnutls26/2.12.14-5ubuntu3.9
https://launchpad.net/ubuntu/+source/gnutls26/2.8.5-2ubuntu0.7

Original Source

Url : http://www.ubuntu.com/usn/USN-2540-1

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-310 Cryptographic Issues
50 % CWE-17 Code

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 178

Nessus® Vulnerability Scanner

Date Description
2015-09-29 Name : The remote device is missing a vendor-supplied security patch.
File : f5_bigip_SOL17327.nasl - Type : ACT_GATHER_INFO
2015-08-05 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2015-575.nasl - Type : ACT_GATHER_INFO
2015-08-04 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20150722_gnutls_on_SL6_x.nasl - Type : ACT_GATHER_INFO
2015-07-31 Name : The remote OracleVM host is missing a security update.
File : oraclevm_OVMSA-2015-0101.nasl - Type : ACT_GATHER_INFO
2015-07-30 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2015-1457.nasl - Type : ACT_GATHER_INFO
2015-07-28 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2015-1457.nasl - Type : ACT_GATHER_INFO
2015-07-23 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2015-1457.nasl - Type : ACT_GATHER_INFO
2015-04-08 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_gnutls-150325.nasl - Type : ACT_GATHER_INFO
2015-03-26 Name : The remote Debian host is missing a security update.
File : debian_DLA-180.nasl - Type : ACT_GATHER_INFO
2015-03-24 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2540-1.nasl - Type : ACT_GATHER_INFO
2015-03-17 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3191.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2015-08-15 00:30:26
  • Multiple Updates
2015-03-26 00:34:30
  • Multiple Updates
2015-03-25 13:28:52
  • Multiple Updates
2015-03-24 21:30:51
  • Multiple Updates
2015-03-23 21:27:08
  • First insertion