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Crypt::CBC RandomIV Header IV Handling Security Issue
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Secunia Advisory:
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SA18755
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Release Date:
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2006-02-27
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Last Update:
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2006-03-02
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | Crypt::CBC 2.x (PERL module)
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| | CVE reference: | CVE-2006-0898 (Secunia mirror)
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Description:
Lincoln Stein has reported a security issue in Crypt::CBC, which can be exploited by malicious people to bypass certain security restrictions.
The security issue is caused due to an error within the handling of 16-byte IV (Initialisation Vector) when the RandomIV-style header is used. This can cause the latter 8 bytes of each block to be CBC encrypted with a constant IV of 0's when the Rijndael cipher (or other ciphers with 16-byte block size) is used.
The security issue has been reported in version 2.16 and prior.
Solution:
Update to version 2.17.
http://search.cpan.org/dist/Crypt-CBC/
Provided and/or discovered by:
Lincoln Stein
Changelog:
2006-03-02: Added CVE reference.
Original Advisory:
http://search.cpan.org/src/LDS/Crypt-CBC-2.17/Changes
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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