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Gentoo Linux Security Advisory GLSA 200909-20 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: cURL: Certificate validation error |
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Date: September 25, 2009 |
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Bugs: #281515 |
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ID: 200909-20 |
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Synopsis |
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======== |
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|
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An error in the X.509 certificate handling of cURL might enable remote |
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attackers to conduct man-in-the-middle attacks. |
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|
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Background |
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========== |
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|
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cURL is a command line tool for transferring files with URL syntax, |
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supporting numerous protocols. |
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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 < 7.19.6 >= 7.19.6 |
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Description |
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=========== |
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|
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Scott Cantor reported that cURL does not properly handle fields in |
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X.509 certificates that contain an ASCII NUL (\0) character. |
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Specifically, the processing of such fields is stopped at the first |
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occurence of a NUL character. This type of vulnerability was recently |
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discovered by Dan Kaminsky and Moxie Marlinspike. |
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|
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Impact |
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====== |
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|
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A remote attacker might employ a specially crafted X.509 certificate |
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(that for instance contains a NUL character in the Common Name field) |
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to conduct man-in-the-middle attacks. |
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|
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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-7.19.6 |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2009-2417 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2417 |
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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-200909-20.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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|
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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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