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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200603-15] Crypt::CBC: Insecure initialization vector Vulnerability Assessment Details
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[GLSA-200603-15] Crypt::CBC: Insecure initialization vector |
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Crypt::CBC: Insecure initialization vector Detailed Explanation for this Vulnerability Assessment The remote host is affected by the vulnerability described in GLSA-200603-15 (Crypt::CBC: Insecure initialization vector) 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 A possible hacker 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. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0898 Solution: All Crypt::CBC users should upgrade to the latest available version: # emerge --sync # emerge --ask --oneshot --verbose ">=dev-perl/crypt-cbc-2.17" Network Security Threat Level: Low Networks Security ID: Vulnerability Assessment Copyright: (C) 2006 Michel Arboi |
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