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70 lines
2.1 KiB
70 lines
2.1 KiB
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200603-15">
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<title>Crypt::CBC: Insecure initialization vector</title>
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<synopsis>
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Crypt::CBC uses an insecure initialization vector, potentially resulting in
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a weaker encryption.
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</synopsis>
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<product type="ebuild">crypt-cbc</product>
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<announced>March 17, 2006</announced>
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<revised>March 17, 2006: 01</revised>
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<bug>126048</bug>
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<access>remote</access>
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<affected>
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<package name="dev-perl/crypt-cbc" auto="yes" arch="*">
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<unaffected range="ge">2.17</unaffected>
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<vulnerable range="lt">2.17</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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Crypt::CBC is a Perl module to encrypt data using cipher block
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chaining (CBC).
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</p>
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</background>
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<description>
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<p>
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Lincoln Stein discovered that Crypt::CBC fails to handle 16 bytes
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long initializiation vectors correctly when running in the RandomIV
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mode, resulting in a weaker encryption because the second part of every
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block will always be encrypted with zeros if the blocksize of the
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cipher is greater than 8 bytes.
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</p>
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</description>
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<impact type="low">
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<p>
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An attacker could exploit weak ciphertext produced by Crypt::CBC
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to bypass certain security restrictions or to gain access to sensitive
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data.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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All Crypt::CBC users should upgrade to the latest available
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version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=dev-perl/crypt-cbc-2.17"</code>
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</resolution>
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<references>
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<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0898">CVE-2006-0898</uri>
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</references>
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<metadata tag="requester" timestamp="Tue, 14 Mar 2006 21:26:26 +0000">
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koon
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</metadata>
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<metadata tag="bugReady" timestamp="Tue, 14 Mar 2006 21:26:50 +0000">
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koon
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</metadata>
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<metadata tag="submitter" timestamp="Tue, 14 Mar 2006 23:04:56 +0000">
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DerCorny
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</metadata>
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</glsa>
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