Executive Summary

Summary
Title nettle: Information disclosure
Informations
Name GLSA-201706-21 First vendor Publication 2017-06-22
Vendor Gentoo Last vendor Modification 2017-06-22
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:P/I:N/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 cache-related side channel vulnerability was found in nettle which might allow an attacker to obtain sensitive information.

Background

Nettle is a cryptographic library that is designed to fit easily in almost any context: In cryptographic toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like lsh or GnuPG, or even in kernel space.

Description

It was found that nettle's RSA and DSA decryption code was vulnerable to cache-related side channel attacks.

See the referenced technical paper "Cache Attacks Enable Bulk Key Recovery on the Cloud" below for details.

Impact

An attacker could recover the private key from a co-located virtual-machine instance.

Workaround

There is no known workaround at this time.

Resolution

All nettle users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.2-r1"

References

[ 1 ] CVE-2016-6489 : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6489
[ 2 ] Cache Attacks Enable Bulk Key Recovery on the Cloud https://eprint.iacr.org/2016/596.pdf

Availability

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

https://security.gentoo.org/glsa/201706-21

Original Source

Url : http://security.gentoo.org/glsa/glsa-201706-21.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-203 Information Exposure Through Discrepancy

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 1
Os 4
Os 1
Os 1
Os 1
Os 1

Nessus® Vulnerability Scanner

Date Description
2018-08-17 Name : The remote PhotonOS host is missing multiple security updates.
File : PhotonOS_PHSA-2018-1_0-0119.nasl - Type : ACT_GATHER_INFO
2017-06-23 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201706-21.nasl - Type : ACT_GATHER_INFO
2017-06-13 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-675.nasl - Type : ACT_GATHER_INFO
2017-06-05 Name : The remote SUSE host is missing one or more security updates.
File : suse_SU-2017-1481-1.nasl - Type : ACT_GATHER_INFO
2017-05-01 Name : The remote EulerOS host is missing multiple security updates.
File : EulerOS_SA-2016-1061.nasl - Type : ACT_GATHER_INFO
2017-02-07 Name : The remote Ubuntu host is missing one or more security-related patches.
File : ubuntu_USN-3193-1.nasl - Type : ACT_GATHER_INFO
2016-12-15 Name : The remote Scientific Linux host is missing one or more security updates.
File : sl_20161103_nettle_on_SL7_x.nasl - Type : ACT_GATHER_INFO
2016-11-28 Name : The remote CentOS host is missing one or more security updates.
File : centos_RHSA-2016-2582.nasl - Type : ACT_GATHER_INFO
2016-11-21 Name : The remote Fedora host is missing one or more security updates.
File : fedora_2016-762cb57c92.nasl - Type : ACT_GATHER_INFO
2016-11-11 Name : The remote Oracle Linux host is missing one or more security updates.
File : oraclelinux_ELSA-2016-2582.nasl - Type : ACT_GATHER_INFO
2016-11-04 Name : The remote Red Hat host is missing one or more security updates.
File : redhat-RHSA-2016-2582.nasl - Type : ACT_GATHER_INFO
2016-08-12 Name : The remote Debian host is missing a security update.
File : debian_DLA-593.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
Date Informations
2017-06-24 13:23:30
  • Multiple Updates
2017-06-22 21:21:56
  • First insertion