Vulnerability CVE-2009-0125
Published: 2009-01-15   Modified: 2012-02-13

Description:
** DISPUTED ** NOTE: this issue has been disputed by the upstream vendor. nasl/nasl_crypto2.c in the Nessus Attack Scripting Language library (aka libnasl) 2.2.11 does not properly check the return value from the OpenSSL DSA_do_verify function, which allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature, a similar vulnerability to CVE-2008-5077. NOTE: the upstream vendor has disputed this issue, stating "while we do misuse this function (this is a bug), it has absolutely no security ramification."

Type:

CWE-287

 (Improper Authentication)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:N/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
None
None
Affected software
Finkproject -> Libnasl 

 References:
https://bugzilla.redhat.com/show_bug.cgi?id=479655
http://www.attrition.org/pipermail/vim/2009-January/002133.html
http://openwall.com/lists/oss-security/2009/01/12/4
http://lists.opensuse.org/opensuse-security-announce/2009-02/msg00000.html
http://cvs.fedoraproject.org/viewvc/rpms/libnasl/F-10/libnasl.spec?r1=1.16&r2=1.17
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=511517
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