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Gentoo Linux Security Advisory GLSA 201706-21 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: nettle: Information disclosure |
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Date: June 22, 2017 |
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Bugs: #590484 |
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ID: 201706-21 |
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Synopsis |
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======== |
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|
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A cache-related side channel vulnerability was found in nettle which |
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might allow an attacker to obtain sensitive information. |
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|
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Background |
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========== |
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|
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Nettle is a cryptographic library that is designed to fit easily in |
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almost any context: In cryptographic toolkits for object-oriented |
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languages, such as C++, Python, or Pike, in applications like lsh or |
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GnuPG, or even in kernel space. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 dev-libs/nettle < 3.2-r1 >= 3.2-r1 |
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Description |
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=========== |
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|
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It was found that nettle's RSA and DSA decryption code was vulnerable |
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to cache-related side channel attacks. |
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|
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See the referenced technical paper "Cache Attacks Enable Bulk Key |
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Recovery on the Cloud" below for details. |
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Impact |
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====== |
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|
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An attacker could recover the private key from a co-located |
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virtual-machine instance. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All nettle users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-libs/nettle-3.2-r1" |
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References |
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========== |
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[ 1 ] CVE-2016-6489 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-6489 |
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[ 2 ] Cache Attacks Enable Bulk Key Recovery on the Cloud |
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https://eprint.iacr.org/2016/596.pdf |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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https://security.gentoo.org/glsa/201706-21 |
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|
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Concerns? |
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========= |
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|
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users' machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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https://bugs.gentoo.org. |
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License |
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======= |
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|
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Copyright 2017 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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