CVE-2011-4539

dhcp: DoS due to processing certain regular expressions

Severity Score

5.0

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

dhcpd en ISC DHCP v4.x antes de v4.2.3-P1 y v4.1-ESV antes de v4.1-ESV-R4 no manipula correctamente expresiones regulares en dhcpd.conf, lo que permite a atacantes remotos provocar una denegación de servicio (caída del deminio) a través de un paquete de petición modificado.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2011-11-22 CVE Reserved
2011-12-08 CVE Published
2024-06-07 EPSS Updated
2024-08-07 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (15)

URL	Tag	Source
http://secunia.com/advisories/47153	Third Party Advisory
http://secunia.com/advisories/47178	Third Party Advisory
http://www.securityfocus.com/bid/50971	Third Party Advisory
http://www.securitytracker.com/id?1026393	Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/71680	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html	2020-04-01
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html	2020-04-01
http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html	2020-04-01
http://security.gentoo.org/glsa/glsa-201301-06.xml	2020-04-01
http://www.debian.org/security/2012/dsa-2519	2020-04-01
http://www.mandriva.com/security/advisories?name=MDVSA-2011:182	2020-04-01
http://www.ubuntu.com/usn/USN-1309-1	2020-04-01
https://www.isc.org/software/dhcp/advisories/cve-2011-4539	2020-04-01
https://access.redhat.com/security/cve/CVE-2011-4539	2011-12-14
https://bugzilla.redhat.com/show_bug.cgi?id=761265	2011-12-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0 Search vendor "Isc" for product "Dhcp" and version "4.0"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.0 Search vendor "Isc" for product "Dhcp" and version "4.0.0"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.1 Search vendor "Isc" for product "Dhcp" and version "4.0.1"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.1 Search vendor "Isc" for product "Dhcp" and version "4.0.1"		b1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.1 Search vendor "Isc" for product "Dhcp" and version "4.0.1"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.2 Search vendor "Isc" for product "Dhcp" and version "4.0.2"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.2 Search vendor "Isc" for product "Dhcp" and version "4.0.2"		b1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.2 Search vendor "Isc" for product "Dhcp" and version "4.0.2"		b2		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.2 Search vendor "Isc" for product "Dhcp" and version "4.0.2"		b3		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.2 Search vendor "Isc" for product "Dhcp" and version "4.0.2"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.3 Search vendor "Isc" for product "Dhcp" and version "4.0.3"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.3 Search vendor "Isc" for product "Dhcp" and version "4.0.3"		b1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.0.3 Search vendor "Isc" for product "Dhcp" and version "4.0.3"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1"		b3		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1.1 Search vendor "Isc" for product "Dhcp" and version "4.1.1"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1.2 Search vendor "Isc" for product "Dhcp" and version "4.1.2"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		a1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		a2		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		b1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		b2		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		p1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.0 Search vendor "Isc" for product "Dhcp" and version "4.2.0"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1"		b1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.1 Search vendor "Isc" for product "Dhcp" and version "4.2.1"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.2 Search vendor "Isc" for product "Dhcp" and version "4.2.2"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.2 Search vendor "Isc" for product "Dhcp" and version "4.2.2"		b1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.2 Search vendor "Isc" for product "Dhcp" and version "4.2.2"		rc1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.2.3 Search vendor "Isc" for product "Dhcp" and version "4.2.3"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv"		-		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv"		r1		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv"		r2		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv"		r3		Affected
Isc Search vendor "Isc"		Dhcp Search vendor "Isc" for product "Dhcp"				4.1-esv Search vendor "Isc" for product "Dhcp" and version "4.1-esv"		r3_b1		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				11.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "11.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				11.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "11.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				6.0 Search vendor "Debian" for product "Debian Linux" and version "6.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected