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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200603-15">
<title>Crypt::CBC: Insecure initialization vector</title>
Crypt::CBC uses an insecure initialization vector, potentially resulting in
a weaker encryption.
<product type="ebuild">crypt-cbc</product>
<announced>March 17, 2006</announced>
<revised>March 17, 2006: 01</revised>
<package name="dev-perl/crypt-cbc" auto="yes" arch="*">
<unaffected range="ge">2.17</unaffected>
<vulnerable range="lt">2.17</vulnerable>
Crypt::CBC is a Perl module to encrypt data using cipher block
chaining (CBC).
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 type="low">
An attacker could exploit weak ciphertext produced by Crypt::CBC
to bypass certain security restrictions or to gain access to sensitive
There is no known workaround at this time.
All Crypt::CBC users should upgrade to the latest available
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=dev-perl/crypt-cbc-2.17&quot;</code>
<uri link="">CVE-2006-0898</uri>
<metadata tag="requester" timestamp="Tue, 14 Mar 2006 21:26:26 +0000">
<metadata tag="bugReady" timestamp="Tue, 14 Mar 2006 21:26:50 +0000">
<metadata tag="submitter" timestamp="Tue, 14 Mar 2006 23:04:56 +0000">