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GnuTLS RSA Signature Forgery Vulnerability
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Secunia Advisory:
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SA21937
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Release Date:
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2006-09-15
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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: | GnuTLS 1.x
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| | CVE reference: | CVE-2006-4790 (Secunia mirror)
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Description:
A vulnerability has been reported in GnuTLS, which can be exploited by malicious people to bypass certain security restrictions.
The vulnerability is caused due to an error in the verification of certain signatures. If a RSA key with exponent 3 is used, it may be possible to forge PKCS #1 v1.5 signatures signed with that key.
The vulnerability has been reported in version 1.4.2. Other versions may also be affected.
Note: The vulnerability is related to SA21709.
Solution:
Update to version 1.4.4.
Provided and/or discovered by:
Originally reported by Daniel Bleichenbacher.
The vendor credits Yutaka Oiwa, Kazukuni Kobaraan, and Hajime Watanabe for reporting a variant in GnuTLS.
Original Advisory:
http://lists.gnupg.org/pipermail/gnutls-dev/2006-September/001205.html
Other References:
SA21709:
http://secunia.com/advisories/21709/
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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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4 Related Secunia Security Advisories
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1. GnuTLS Multiple Vulnerabilities
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2. GnuTLS libtasn1 DER Decoding Denial of Service Vulnerabilities
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3. GnuTLS Record Packet Parsing Denial of Service Vulnerability
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4. GnuTLS X.509 Certificate Signature Verification Denial of Service
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