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Family: Gentoo Local Security Checks --> Category: infos
[GLSA-200609-15] GnuTLS: RSA Signature Forgery Vulnerability Scan
Vulnerability Scan Summary
GnuTLS: RSA Signature Forgery
Detailed Explanation for this Vulnerability Test
The remote host is affected by the vulnerability described in GLSA-200609-15
(GnuTLS: RSA Signature Forgery)
verify.c fails to properly handle excess data in
digestAlgorithm.parameters field while generating a hash when using an
RSA key with exponent 3. RSA keys that use exponent 3 are commonplace.
Impact
Remote attackers could forge PKCS #1 v1.5 signatures that are signed
with an RSA key, preventing GnuTLS from correctly verifying X.509 and
other certificates that use PKCS.
Workaround
There is no known workaround at this time.
References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4790
Solution:
All GnuTLS users should update both packages:
# emerge --sync
# emerge --update --ask --verbose ">=net-libs/gnutls-1.4.4"
Threat Level: Medium
Click HERE for more information and discussions on this network vulnerability scan.
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