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.
Conclusion & alert: CVE-2012-3571 is rated High Exploit Risk (69.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 17.43%, 95th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 37538 | exploit_db | edb | 2012-07-25 | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-07 | 20.55% | 17.43% | -3.13% |
| 2 | 2026-03-26 | 22.14% | 20.55% | -1.58% |
| 3 | 2025-04-30 | — | 22.14% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.1 | 2.0 | MEDIUM |
|
6.5 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2012-3571 not yet assigned priority: Debian including 1 source packages (isc-dhcp), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2012-3571 |
gentoo
|
normal | CVE-2012-3571: 1 GLSA(s) (201301-06), 1 atom(s) (net-misc/dhcp); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-3571 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2012-3571 |
suse
|
medium | CVE-2012-3571 severity moderate: SUSE including 61 source package names (dhcp-3.1.3.ESV-0.17.1, dhcp-4.2.4.P1-0.5.1, …), 99 product×package rows across 37 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 12, … (37 product lines)): Fixed 99. | https://www.suse.com/security/cve/CVE-2012-3571/ |
ubuntu
|
medium | CVE-2012-3571 medium priority: Ubuntu including 2 source packages (dhcp3, isc-dhcp), 12 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): DNE 5, released 3, needs-triage 2, not-affected 2. | https://ubuntu.com/security/CVE-2012-3571 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| isc | dhcp | 4.1.2 | cpe:2.3:a:isc:dhcp:4.1.2:*:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:* |
| isc | dhcp | 4.2.0 | cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:* |
| isc | dhcp | 4.2.1 | cpe:2.3:a:isc:dhcp:4.2.1:-:*:*:*:*:*:* |
| isc | dhcp | 4.2.1 | cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:* |
| isc | dhcp | 4.2.1 | cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:* |
| isc | dhcp | 4.2.2 | cpe:2.3:a:isc:dhcp:4.2.2:-:*:*:*:*:*:* |
| isc | dhcp | 4.2.2 | cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:* |
| isc | dhcp | 4.2.2 | cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:* |
| isc | dhcp | 4.2.3 | cpe:2.3:a:isc:dhcp:4.2.3:-:*:*:*:*:*:* |
| isc | dhcp | 4.2.3 | cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:* |
| isc | dhcp | 4.2.3 | cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:* |
| isc | dhcp | 4.2.4 | cpe:2.3:a:isc:dhcp:4.2.4:*:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1:*:*:*:*:*:* |
| isc | dhcp | 4.1-esv | cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2:*:*:*:*:*:* |
| canonical | ubuntu_linux | 11.04 | cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 11.10 | cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* |
| debian | debian_linux | 6.0 | cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 | Third Party Advisory |
| http://lists.opensuse.org/opensuse-updates/2012-08/msg00030.html | Mailing List Third Party Advisory |
| http://rhn.redhat.com/errata/RHSA-2012-1140.html | Third Party Advisory |
| http://rhn.redhat.com/errata/RHSA-2012-1141.html | Third Party Advisory |
| http://security.gentoo.org/glsa/glsa-201301-06.xml | Third Party Advisory |
| http://www.debian.org/security/2012/dsa-2516 | Third Party Advisory |
| http://www.debian.org/security/2012/dsa-2519 | Third Party Advisory |
| http://www.mandriva.com/security/advisories?name=MDVSA-2012:115 | Third Party Advisory |
| http://www.mandriva.com/security/advisories?name=MDVSA-2012:116 | Third Party Advisory |
| http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html | Third Party Advisory |
| http://www.securityfocus.com/bid/54665 | Third Party Advisory VDB Entry |
| http://www.ubuntu.com/usn/USN-1519-1 | Third Party Advisory |
| https://kb.isc.org/article/AA-00712 | Vendor Advisory |