Executive Summary

Summary
Title Libgcrypt: Side-channel attack
Informations
Name GLSA-201408-10 First vendor Publication 2014-08-29
Vendor Gentoo Last vendor Modification 2014-08-29
Severity (Vendor) Normal 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:L/AC:L/Au:N/C:P/I:N/A:N)
Cvss Base Score 2.1 Attack Range Local
Cvss Impact Score 2.9 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A vulnerability in Libgcrypt could allow a remote attacker to extract ElGamal private key information.

Background

Libgcrypt is a general purpose cryptographic library derived out of GnuPG.

Description

A vulnerability in the implementation of ElGamal decryption procedures of Libgcrypt leaks information to various side-channels.

Impact

A physical side-channel attack allows a remote attacker to fully extract decryption keys during the decryption of a chosen ciphertext.

Workaround

There is no known workaround at this time.

Resolution

All Libgcrypt users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/libgcrypt-1.5.4"

References

[ 1 ] CVE-2014-5270 : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-5270

Availability

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

http://security.gentoo.org/glsa/glsa-201408-10.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-201408-10.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-200 Information Exposure

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:25845
 
Oval ID: oval:org.mitre.oval:def:25845
Title: USN-2339-2 -- libgcrypt11 vulnerability
Description: Libgcrypt could expose sensitive information when performing decryption.
Family: unix Class: patch
Reference(s): USN-2339-2
CVE-2014-5270
Version: 3
Platform(s): Ubuntu 14.04
Ubuntu 12.04
Ubuntu 10.04
Product(s): libgcrypt11
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:26547
 
Oval ID: oval:org.mitre.oval:def:26547
Title: SUSE-SU-2014:1077-1 -- Security update for libgcrypt
Description: This libgcrypt update fixes the following security issue: * bnc#892464: Side-channel attack on Elgamal encryption subkeys. (CVE-2014-5270) Security Issues: * CVE-2014-5270 <http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-5270>
Family: unix Class: patch
Reference(s): SUSE-SU-2014:1077-1
CVE-2014-5270
Version: 3
Platform(s): SUSE Linux Enterprise Server 11
SUSE Linux Enterprise Desktop 11
Product(s): libgcrypt
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:26710
 
Oval ID: oval:org.mitre.oval:def:26710
Title: DSA-3024-1 gnupg - security update
Description: Genkin, Pipman and Tromer discovered a side-channel attack on Elgamal encryption subkeys (<a href="https://security-tracker.debian.org/tracker/CVE-2014-5270">CVE-2014-5270</a>).
Family: unix Class: patch
Reference(s): DSA-3024-1
CVE-2014-5270
Version: 3
Platform(s): Debian GNU/Linux 7.0
Debian GNU/kFreeBSD 7.0
Product(s): gnupg
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:26749
 
Oval ID: oval:org.mitre.oval:def:26749
Title: USN-2339-1 -- gnupg vulnerability
Description: GnuPG could expose sensitive information when performing decryption.
Family: unix Class: patch
Reference(s): USN-2339-1
CVE-2014-5270
Version: 3
Platform(s): Ubuntu 12.04
Ubuntu 10.04
Product(s): gnupg
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:27968
 
Oval ID: oval:org.mitre.oval:def:27968
Title: DSA-3073-1 -- libgcrypt11 security update
Description: Daniel Genkin, Itamar Pipman and Eran Tromer discovered that Elgamal encryption subkeys in applications using the libgcrypt11 library, for example GnuPG 2.x, could be leaked via a side-channel attack.
Family: unix Class: patch
Reference(s): DSA-3073-1
CVE-2014-5270
Version: 3
Platform(s): Debian GNU/Linux 7.0
Debian GNU/kFreeBSD 7.0
Product(s): libgcrypt11
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 9
Os 1

Nessus® Vulnerability Scanner

Date Description
2015-08-05 Name : The remote Amazon Linux AMI host is missing a security update.
File : ala_ALAS-2015-577.nasl - Type : ACT_GATHER_INFO
2015-04-02 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-2554-1.nasl - Type : ACT_GATHER_INFO
2015-03-30 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2015-154.nasl - Type : ACT_GATHER_INFO
2015-03-26 Name : The remote Debian host is missing a security update.
File : debian_DLA-93.nasl - Type : ACT_GATHER_INFO
2014-11-17 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3073.nasl - Type : ACT_GATHER_INFO
2014-09-23 Name : The remote Mandriva Linux host is missing a security update.
File : mandriva_MDVSA-2014-180.nasl - Type : ACT_GATHER_INFO
2014-09-14 Name : The remote Debian host is missing a security-related update.
File : debian_DSA-3024.nasl - Type : ACT_GATHER_INFO
2014-09-12 Name : The remote Mandriva Linux host is missing one or more security updates.
File : mandriva_MDVSA-2014-176.nasl - Type : ACT_GATHER_INFO
2014-09-04 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-2339-1.nasl - Type : ACT_GATHER_INFO
2014-09-04 Name : The remote Ubuntu host is missing a security-related patch.
File : ubuntu_USN-2339-2.nasl - Type : ACT_GATHER_INFO
2014-09-02 Name : The remote SuSE 11 host is missing one or more security updates.
File : suse_11_libgcrypt-devel-140819.nasl - Type : ACT_GATHER_INFO
2014-08-30 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201408-10.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
3
Date Informations
2014-10-11 00:27:22
  • Multiple Updates
2014-10-10 09:29:00
  • Multiple Updates
2014-08-31 13:25:14
  • Multiple Updates
2014-08-29 13:22:43
  • First insertion