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Gentoo Linux Security Advisory GLSA 201703-04 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: cURL: Certificate validation error |
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Date: March 28, 2017 |
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Bugs: #610572 |
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ID: 201703-04 |
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Synopsis |
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======== |
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|
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A coding error has been found in cURL, causing the TLS Certificate |
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Status Request extension check to always return true. |
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Background |
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========== |
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|
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cURL is a tool and libcurl is a library for transferring data with URL |
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syntax. |
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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 net-misc/curl < 7.53.0 >= 7.53.0 |
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Description |
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=========== |
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|
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cURL and applications linked against libcurl support "OCSP stapling", |
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also known as the TLS Certificate Status Request extension (using the |
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CURLOPT_SSL_VERIFYSTATUS option). When telling cURL to use this |
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feature, it uses that TLS extension to ask for a fresh proof of the |
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server's certificate's validity. If the server doesn't support the |
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extension, or fails to provide said proof, cURL is expected to return |
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an error. |
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Due to a coding mistake, the code that checks for a test success or |
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failure, ends up always thinking there's valid proof, even when there |
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is none or if the server doesn't support the TLS extension in question. |
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Impact |
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====== |
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|
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Due to the error, a user maybe does not detect when a server's |
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certificate goes invalid or otherwise be mislead that the server is in |
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a better shape than it is in reality. |
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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 cURL users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/curl-7.53.0" |
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References |
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========== |
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[ 1 ] CVE-2017-2629 |
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http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-2629 |
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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/201703-04 |
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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 2017 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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http://creativecommons.org/licenses/by-sa/2.5 |
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