drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Verwendung schwacher Verschlüsselung in Crypt::CBC
Name: |
Verwendung schwacher Verschlüsselung in Crypt::CBC |
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ID: |
200603-15 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Fr, 17. März 2006, 19:21 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0898 |
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Applikationen: |
Crypt::CBC |
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Originalnachricht |
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200603-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Low Title: Crypt::CBC: Insecure initialization vector Date: March 17, 2006 Bugs: #126048 ID: 200603-15
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Synopsis ========
Crypt::CBC uses an insecure initialization vector, potentially resulting in a weaker encryption.
Background ==========
Crypt::CBC is a Perl module to encrypt data using cipher block chaining (CBC).
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-perl/crypt-cbc < 2.17 >= 2.17
Description ===========
Lincoln Stein discovered that Crypt::CBC fails to handle 16 bytes long initializiation vectors correctly when running in the RandomIV mode, resulting in a weaker encryption because the second part of every block will always be encrypted with zeros if the blocksize of the cipher is greater than 8 bytes.
Impact ======
An attacker could exploit weak ciphertext produced by Crypt::CBC to bypass certain security restrictions or to gain access to sensitive data.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All Crypt::CBC users should upgrade to the latest available version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-perl/crypt-cbc-2.17"
References ==========
[ 1 ] CVE-2006-0898 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0898
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200603-15.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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