GLSA Advocate
Joined: 12 May 2004 Posts: 2663
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Posted: Tue Jul 11, 2017 6:26 pm Post subject: [ GLSA 201706-21 ] nettle |
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Gentoo Linux Security Advisory
Title: nettle: Information disclosure (GLSA 201706-21)
Severity: normal
Exploitable: local, remote
Date: 2017-06-22
Bug(s): #590484
ID: 201706-21
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.
Affected Packages
Package: dev-libs/nettle
Vulnerable: < 3.2-r1
Unaffected: >= 3.2-r1
Architectures: All supported architectures
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: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.2-r1"
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References
CVE-2016-6489
Cache Attacks Enable Bulk
Key Recovery on the Cloud
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