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Gentoo Linux Security Advisory GLSA 200902-02 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: OpenSSL: Certificate validation error |
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Date: February 12, 2009 |
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Bugs: #251346 |
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ID: 200902-02 |
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Synopsis |
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======== |
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|
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An error in the OpenSSL certificate chain validation might allow for |
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spoofing attacks. |
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|
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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 < 0.9.8j >= 0.9.8j |
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|
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Description |
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=========== |
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|
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The Google Security Team reported that several functions incorrectly |
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check the result after calling the EVP_VerifyFinal() function, allowing |
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a malformed signature to be treated as a good signature rather than as |
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an error. This issue affects the signature checks on DSA and ECDSA keys |
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used with SSL/TLS. |
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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 this vulnerability and spoof arbitrary |
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names to conduct Man-In-The-Middle attacks and intercept sensitive |
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information. |
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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 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-0.9.8j" |
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References |
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========== |
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[ 1 ] CVE-2008-5077 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077 |
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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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http://security.gentoo.org/glsa/glsa-200902-02.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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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2009 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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http://creativecommons.org/licenses/by-sa/2.5 |
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