Vulnerability Report

CVE-2011-4539

Title: Isc Dhcp Denial of Service (DoS)

DoS

Proof Of Concept

No public PoC currently indexed for CVE-2011-4539.

CWE Category CWE-20
Published Date Dec 08, 2011
Modified Date Apr 29, 2026
Exploit Status Not Found
Score 5.0 CVSS v2.0
Exploit Probability (EPSS)
32.26%

Vulnerability Summary

CVE-2011-4539: dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet.

Impacted Vendors

I
isc 1

Reference Links

http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html http://secunia.com/advisories/47153 http://secunia.com/advisories/47178 http://security.gentoo.org/glsa/glsa-201301-06.xml http://www.debian.org/security/2012/dsa-2519 http://www.mandriva.com/security/advisories?name=MDVSA-2011:182 http://www.securityfocus.com/bid/50971 http://www.securitytracker.com/id?1026393 http://www.ubuntu.com/usn/USN-1309-1 https://exchange.xforce.ibmcloud.com/vulnerabilities/71680 https://www.isc.org/software/dhcp/advisories/cve-2011-4539 http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html http://secunia.com/advisories/47153 http://secunia.com/advisories/47178 http://security.gentoo.org/glsa/glsa-201301-06.xml http://www.debian.org/security/2012/dsa-2519 http://www.mandriva.com/security/advisories?name=MDVSA-2011:182 http://www.securityfocus.com/bid/50971 http://www.securitytracker.com/id?1026393 http://www.ubuntu.com/usn/USN-1309-1 https://exchange.xforce.ibmcloud.com/vulnerabilities/71680 https://www.isc.org/software/dhcp/advisories/cve-2011-4539
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:N/I:N/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2011-4539 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A
Complexity N/A
Privileges N/A
Interaction NONE
CVSS Vector String AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected Stack

No specific products linked.