CVE-2012-3571

medium

Published 2012-07-25 · Modified 2026-04-29

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

7.1

Description

ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-37538 dos linux verified

Markus Hietava · 2012-07-25

ISC DHCP 4.x - Multiple Denial of Service Vulnerabilities

Source code queued for fetch — refresh in a moment.

OS impact

Ubuntu Affected 3 releases

Version	Status	Fixed in
12.04	Affected	—
11.10	Affected	—
11.04	Affected	—

Debian Mixed 6 releases

Version	Status	Fixed in
trixie	Fixed	`4.2.4-2`
sid	Fixed	`4.2.4-2`
bullseye	Fixed	`4.2.4-2`
bookworm	Fixed	`4.2.4-2`
7.0	Affected	—
6.0	Affected	—

Application impact

Vendor	Product	Versions
isc	dhcp	`4.1.2`
isc	dhcp	`4.2.0`
isc	dhcp	`4.2.1`
isc	dhcp	`4.2.2`
isc	dhcp	`4.2.3`
isc	dhcp	`4.2.4`
isc	dhcp	`4.1-esv`

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.