CVE-2009-0025 — BIND 9

BIND 9.6.0, 9.5.1, 9.5.0, 9.4.3, and earlier does not properly check the return value from the OpenSSL DSA_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.

01What is this vulnerability?

BIND 9.6.0, 9.5.1, 9.5.0, 9.4.3, and earlier does not properly check the return value from the OpenSSL DSA_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.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

08Timeline

• Published: 2009-01-07T17:00:00.000Z
• Last modified: 2024-08-07T04:17:10.533Z

09References

• www.vmware.com — http://www.vmware.com/security/advisories/VMSA-2009-0004.html
• marc.info — http://marc.info/?l=bugtraq&m=141879471518471&w=2
• www.securityfocus.com — http://www.securityfocus.com/bid/33151
• support.apple.com — http://support.apple.com/kb/HT3549
• www.securityfocus.com — http://www.securityfocus.com/archive/1/499827/100/0/threaded
• marc.info — http://marc.info/?l=bugtraq&m=141879471518471&w=2
• issues.rpath.com — https://issues.rpath.com/browse/RPL-2938
• www.openbsd.org — http://www.openbsd.org/errata44.html#008_bind
• wiki.rpath.com — http://wiki.rpath.com/Advisories:rPSA-2009-0009
• secunia.com — http://secunia.com/advisories/33546
• support.avaya.com — http://support.avaya.com/elmodocs2/security/ASA-2009-045.htm
• secunia.com — http://secunia.com/advisories/35074
• oval.cisecurity.org — https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3…
• secunia.com — http://secunia.com/advisories/33559
• sunsolve.sun.com — http://sunsolve.sun.com/search/document.do?assetkey=1-26-250846-1
• lists.apple.com — http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
• www.vupen.com — http://www.vupen.com/english/advisories/2009/0904
• www.vupen.com — http://www.vupen.com/english/advisories/2009/0043
• www.ocert.org — http://www.ocert.org/advisories/ocert-2008-016.html
• www.securityfocus.com — http://www.securityfocus.com/archive/1/502322/100/0/threaded
• security.freebsd.org — http://security.freebsd.org/advisories/FreeBSD-SA-09:04.bind.asc
• slackware.com — http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware…
• secunia.com — http://secunia.com/advisories/33882
• oval.cisecurity.org — https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3…
• www.isc.org — https://www.isc.org/software/bind/advisories/cve-2009-0025
• www.us-cert.gov — http://www.us-cert.gov/cas/techalerts/TA09-133A.html
• groups.google.com — http://groups.google.com/group/comp.protocols.dns.bind/browse_thread/thread/49ef…
• www.vupen.com — http://www.vupen.com/english/advisories/2009/1297
• secunia.com — http://secunia.com/advisories/33683
• www.vupen.com — http://www.vupen.com/english/advisories/2009/0366