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Gentoo Linux Security Advisory GLSA 201404-07 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: OpenSSL: Information Disclosure |
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Date: April 08, 2014 |
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Bugs: #505278, #507074 |
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ID: 201404-07 |
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Synopsis |
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======== |
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|
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Multiple Information Disclosure vulnerabilities in OpenSSL allow remote |
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attackers to obtain sensitive information via various vectors. |
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Background |
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========== |
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|
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OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer |
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(SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general |
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purpose cryptography library. |
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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/openssl < 1.0.1g >= 1.0.1g |
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Description |
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=========== |
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|
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Multiple vulnerabilities have been found in OpenSSL: |
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|
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* OpenSSL incorrectly handles memory in the TLS heartbeat extension, |
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leading to information disclosure of 64kb per request, possibly |
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including private keys ("Heartbleed bug", OpenSSL 1.0.1 only, |
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CVE-2014-0160). |
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* The Montgomery ladder implementation of OpenSSL improperly handles |
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swap operations (CVE-2014-0076). |
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|
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Impact |
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====== |
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|
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A remote attacker could exploit these issues to disclose information, |
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including private keys or other sensitive information, or perform |
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side-channel attacks to obtain ECDSA nonces. |
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|
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Workaround |
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========== |
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Disabling the tls-heartbeat USE flag (enabled by default) provides a |
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workaround for the CVE-2014-0160 issue. |
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Resolution |
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========== |
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All OpenSSL users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-libs/openssl-1.0.1g" |
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Note: All services using OpenSSL to provide TLS connections have to be |
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restarted for the update to take effect. Utilities like |
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app-admin/lib_users can aid in identifying programs using OpenSSL. |
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As private keys may have been compromised using the Heartbleed attack, |
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it is recommended to regenerate them. |
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References |
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========== |
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[ 1 ] CVE-2014-0076 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0076 |
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[ 2 ] CVE-2014-0160 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-0160 |
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[ 3 ] Heartbleed bug website |
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http://heartbleed.com/ |
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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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http://security.gentoo.org/glsa/glsa-201404-07.xml |
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Concerns? |
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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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Copyright 2014 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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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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