ISC DHCP up to 4.2.4 memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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A vulnerability was found in ISC DHCP up to 4.2.4 (Network Management Software) and classified as critical. Affected by this issue is some unknown functionality. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability.

The weakness was disclosed 07/24/2012 by Markus Hietava with Codenomicon CROSS Project as CERT-FI Advisory on ISC DHCP as not defined advisory (Website). The advisory is available at The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2012-3571 since 06/14/2012. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available.

A public exploit has been developed in Python. The exploit is available at It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 68593 (Oracle Linux 5 : dhcp (ELSA-2012-1140)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350632 (Amazon Linux Security Advisory for dhcp: ALAS-2012-115).

Upgrading to version 4.2.4-P1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (77181) and Tenable (68593). The entries 5880 and 5881 are pretty similar.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
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Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Programming Language: 🔍
Download: 🔍

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Nessus ID: 68593
Nessus Name: Oracle Linux 5 : dhcp (ELSA-2012-1140)
Nessus File: 🔍
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OpenVAS ID: 71493
OpenVAS Name: Debian Security Advisory DSA 2516-1 (isc-dhcp)
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: Upgrade
Status: 🔍

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Upgrade: DHCP 4.2.4-P1


06/14/2012 🔍
07/24/2012 +40 days 🔍
07/24/2012 +0 days 🔍
07/25/2012 +1 days 🔍
07/25/2012 +0 days 🔍
07/25/2012 +0 days 🔍
07/26/2012 +1 days 🔍
07/27/2012 +1 days 🔍
08/09/2012 +13 days 🔍
08/09/2012 +0 days 🔍
07/12/2013 +337 days 🔍
03/27/2021 +2815 days 🔍



Advisory: CERT-FI Advisory on ISC DHCP
Researcher: Markus Hietava
Organization: Codenomicon CROSS Project
Status: Not defined
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3571 (🔍)

X-Force: 77181
Vulnerability Center: 35833 - ISC DHCP Remote DoS Vulnerability via a Malformed Client Identifier, Medium
SecurityFocus: 54665 - ISC DHCP Multiple Denial of Service Vulnerabilities
Secunia: 50017 - Debian update for isc-dhcp, Less Critical
OSVDB: 84255

scip Labs:
See also: 🔍


Created: 08/09/2012 01:12 PM
Updated: 03/27/2021 08:11 AM
Changes: 08/09/2012 01:12 PM (79), 04/15/2017 04:24 PM (12), 03/27/2021 08:11 AM (3)
Complete: 🔍


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