CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.1 | $0-$5k | 0.00 |
A vulnerability was found in ISC dhcp up to 4.2.3 (Network Management Software) and classified as problematic. Affected by this issue is an unknown code of the file dhcpd.conf. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does
not validate or incorrectly validates that the input has the
properties that are required to process the data safely and
correctly. Impacted is availability. CVE summarizes:
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.
The weakness was published 12/08/2011 with BlueCat Networks (Website). The advisory is available at isc.org. This vulnerability is handled as CVE-2011-4539. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are known, but there is no available exploit.
The vulnerability scanner Nessus provides a plugin with the ID 68407 (Oracle Linux 6 : dhcp (ELSA-2011-1819)), 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 120898 (Solaris 11 Support Repository Update (SRU) 4 Missing).
Upgrading to version 4.0.3 eliminates this vulnerability.
The vulnerability is also documented in the databases at X-Force (71680) and Tenable (68407). Similar entries are available at 4542, 4541, 4557 and 60574.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 5.1
VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Input validationCWE: CWE-20
ATT&CK: Unknown
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Nessus ID: 68407
Nessus Name: Oracle Linux 6 : dhcp (ELSA-2011-1819)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍
OpenVAS ID: 71496
OpenVAS Name: Debian Security Advisory DSA 2519-1 (isc-dhcp)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: dhcp 4.0.3
Timeline
11/22/2011 🔍12/07/2011 🔍
12/08/2011 🔍
12/08/2011 🔍
12/08/2011 🔍
12/12/2011 🔍
07/12/2013 🔍
03/23/2015 🔍
11/28/2021 🔍
Sources
Vendor: isc.orgAdvisory: RHSA-2011:1819
Organization: BlueCat Networks
Status: Not defined
Confirmation: 🔍
CVE: CVE-2011-4539 (🔍)
OVAL: 🔍
X-Force: 71680
Vulnerability Center: 34004 - ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 dhcpd Remote DoS Vulnerability, Medium
SecurityFocus: 50971 - ISC DHCP Regular Expressions Denial of Service Vulnerability
Secunia: 47153
See also: 🔍
Entry
Created: 03/23/2015 16:50Updated: 11/28/2021 08:07
Changes: 03/23/2015 16:50 (64), 04/05/2017 15:05 (10), 11/28/2021 08:05 (6), 11/28/2021 08:07 (2)
Complete: 🔍
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