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Gentoo Linux Security Advisory GLSA 201507-15 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: OpenSSL: Alternate chains certificate forgery |
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Date: July 10, 2015 |
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Bugs: #554172 |
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ID: 201507-15 |
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Synopsis |
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======== |
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Certain checks on untrusted certificates can be bypassed. |
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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 < 1.0.1p >= 1.0.1p |
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Description |
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=========== |
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|
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During certificate verification, OpenSSL attempts to find an |
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alternative certificate chain if the first attempt to build such a |
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chain fails. |
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Impact |
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====== |
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|
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A remote attacker could cause certain checks on untrusted |
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certificates to be bypassed, such as the CA flag, enabling them to use |
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a valid leaf certificate to act as a CA and "issue" an invalid |
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certificate. |
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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-1.0.1p" |
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References |
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========== |
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[ 1 ] CVE-2015-1793 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-1793 |
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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/201507-15 |
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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 2015 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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