GLSA-201706-21 : nettle: Information disclosure

Medium Nessus Plugin ID 101016

New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it's different from CVSS.

VPR Score: 3.6

Synopsis

The remote Gentoo host is missing one or more security-related patches.

Description

The remote host is affected by the vulnerability described in GLSA-201706-21 (nettle: Information disclosure)

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.

Solution

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

See Also

https://eprint.iacr.org/2016/596.pdf

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

Plugin Details

Severity: Medium

ID: 101016

File Name: gentoo_GLSA-201706-21.nasl

Version: Revision: 3.2

Type: local

Published: 2017/06/23

Updated: 2018/01/26

Dependencies: 12634

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.0

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:nettle, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Patch Publication Date: 2017/06/22

Reference Information

CVE: CVE-2016-6489

GLSA: 201706-21