ISC DHCP up to 4.1-ESV-R15/4.2.8/4.3.6 OMAPI Connection Management resource consumption

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in ISC DHCP up to 4.1-ESV-R15/4.2.8/4.3.6. Affected is an unknown function of the component OMAPI Connection Management. The manipulation leads to resource consumption. This vulnerability is referenced as CVE-2017-3144. Remote exploitation of the attack is possible. No exploit is available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in ISC DHCP up to 4.1-ESV-R15/4.2.8/4.3.6 (Network Management Software). It has been rated as problematic. This issue affects some unknown processing of the component OMAPI Connection Management. The manipulation with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability.

The bug was discovered 01/16/2018. The weakness was published 01/16/2018 as AA-01541 as confirmed security advisory (Website). The advisory is shared at kb.isc.org. The identification of this vulnerability is CVE-2017-3144 since 12/02/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue. The advisory points out:

By intentionally exploiting this vulnerability an attacker who is permitted to establish connections to the OMAPI control port can exhaust the pool of socket descriptors available to the DHCP server. Once exhausted, the server will not accept additional connections, potentially denying access to legitimate connections from the server operator. While the server will continue to receive and service DHCP client requests, the operator can be blocked from the ability to use OMAPI to control server state, add new lease reservations, etc.

The vulnerability scanner Nessus provides a plugin with the ID 106764 (EulerOS 2.0 SP2 : dhcp (EulerOS-SA-2018-1036)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176315 (Debian Security Update for isc-dhcp (DSA 4133-1)).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability. The security advisory contains the following remark:

The recommended remedy is to disallow access to the OMAPI control port from unauthorized clients (in accordance with best practices for server operation).

The vulnerability is also documented in the databases at Tenable (106764), SecurityFocus (BID 102726†) and SecurityTracker (ID 1040194†). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (ISC): 5.3
Vendor Vector (ISC): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector (Internet Systems Consortium (ISC)): 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 106764
Nessus Name: EulerOS 2.0 SP2 : dhcp (EulerOS-SA-2018-1036)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 871081
OpenVAS Name: Ubuntu Update for isc-dhcp USN-3586-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

12/02/2016 🔍
01/16/2018 +410 days 🔍
01/16/2018 +0 days 🔍
01/16/2018 +0 days 🔍
01/16/2018 +0 days 🔍
01/16/2018 +0 days 🔍
01/20/2018 +4 days 🔍
02/13/2018 +24 days 🔍
01/16/2019 +337 days 🔍
02/02/2023 +1478 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01541
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-3144 (🔍)
GCVE (CVE): GCVE-0-2017-3144
GCVE (VulDB): GCVE-100-112265

OVAL: 🔍

SecurityFocus: 102726 - ISC DHCP CVE-2017-3144 Remote Denial of Service Vulnerability
SecurityTracker: 1040194

Entryinfo

Created: 01/20/2018 18:13
Updated: 02/02/2023 10:51
Changes: 01/20/2018 18:13 (89), 12/25/2019 14:48 (5), 02/01/2021 13:03 (2), 02/01/2021 13:08 (1), 02/02/2023 10:51 (11)
Complete: 🔍
Cache ID: 216:762:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!