ISC BIND 9 EVP_VerifyFinal() / DSA_do_verify() SSL/TLS Signature Validation Weakness

medium Nessus Plugin ID 38735
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The remote name server is affected by a signature validation weakness.


According to its version number, the remote installation of BIND does not properly check the return value from the OpenSSL library functions 'EVP_VerifyFinal()' and 'DSA_do_verify()'. A remote attacker may be able to exploit this weakness to spoof answers returned from zones for signature checks on DSA and ECDSA keys used with SSL / TLS.


Upgrade to BIND 9.3.6-P1 / 9.4.3-P1 / 9.5.1-P1 / 9.6.0-P1 or later.

See Also

Plugin Details

Severity: Medium

ID: 38735

File Name: bind_sig_return_checks.nasl

Version: 1.18

Type: remote

Family: DNS

Published: 5/12/2009

Updated: 6/27/2018

Dependencies: bind_version.nasl, dnssec_resolver.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Medium

Score: 6.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Required KB Items: bind/version, DNSSEC/udp/53, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Reference Information

CVE: CVE-2009-0025

BID: 33151

Secunia: 33404

CWE: 287