Date: Mon, 17 Aug 2009 18:29:45 -0500 From: Jamie Strandboge <jamie@...onical.com> To: Simon Josefsson <simon@...efsson.org> Cc: gnutls-devel@....org, oss-security@...ts.openwall.com Subject: Re: GnuTLS CVE-2009-2730 Patches (Was Re: GnuTLS 2.8.2) On Fri, 14 Aug 2009, Jamie Strandboge wrote: > 1.2.9 does not pass the CN test yet, though > at first glance certtool output looks comparable to the others. 1.2.9 also needed: http://git.savannah.gnu.org/cgit/gnutls.git/patch/?id=7b80620f99f4d43f5eda692eefc5c969bb4263c0 Attached is an updated patch for 1.2.9 (still only lightly tested, but verified to pass the test program). This and the 2.0.4 patch previously posted now behave the same, but different from 2.4 and higher. Specifically, when using: $ certtool -i --infile /tmp/badguy-nul-cn.crt We have: |<1>| Found OID: '188.8.131.52' with value '13187777772e62616e6b2e636f6d002e6261646775792e636f6d' X.509 Certificate Information: Version: 3 Serial Number (hex): 01 Issuer: C=GB,ST=Berkshire,L=Newbury,O=My Company Ltd,OU=CA,CN=NULL-friendly CA Validity: Not Before: Tue Aug 4 07:33:43 UTC 2009 Not After: Fri Aug 2 07:33:43 UTC 2019 error: get_dn: ASN1 parser: Error in DER parsing. ... This is in contrast to 2.4 and higher which has: X.509 Certificate Information: Version: 3 Serial Number (hex): 01 Issuer: C=GB,ST=Berkshire,L=Newbury,O=My Company Ltd,OU=CA,CN=NULL-friendly CA Validity: Not Before: Tue Aug 04 07:33:43 UTC 2009 Not After: Fri Aug 02 07:33:43 UTC 2019 Subject: CN=#13187777772e62616e6b2e636f6d002e6261646775792e636f6 ... Jamie -- Jamie Strandboge | http://www.canonical.com View attachment "CVE-2009-2730_1.2.9.patch" of type "text/x-diff" (7581 bytes) Download attachment "signature.asc" of type "application/pgp-signature" (198 bytes)
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