VDB-149527 · CVE-2020-2100 · RHSA-2020:0681

Jenkins up to 2.218/LTS 2.204.1 Service Port 33848 Amplification amplification

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.
5.7	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Jenkins up to 2.218/LTS 2.204.1. It has been rated as problematic. This issue affects some unknown processing of the component Service Port 33848. This manipulation causes amplification (Amplification). This vulnerability is tracked as CVE-2020-2100. The attack is possible to be carried out remotely. No exploit exists. It is advisable to implement restrictive firewalling.

Detailsinfo

A vulnerability classified as problematic was found in Jenkins up to 2.218/LTS 2.204.1 (Continuous Integration Software). Affected by this vulnerability is an unknown function of the component Service Port 33848. The manipulation with an unknown input leads to a amplification vulnerability (Amplification). The CWE definition for the vulnerability is CWE-406. The product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor. As an impact it is known to affect availability. The summary by CVE is:

Jenkins 2.218 and earlier, LTS 2.204.1 and earlier was vulnerable to a UDP amplification reflection denial of service attack on port 33848.

The weakness was disclosed 01/29/2020 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2020-2100 since 12/05/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499.002 according to MITRE ATT&CK.

Proper firewalling of udp/33848 is able to address this issue.

The entries VDB-149526, VDB-149528, VDB-149529 and VDB-149530 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Continuous Integration Software

Name

Jenkins

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.8
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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: 🔍

Exploitinginfo

Name: Amplification
Class: Amplification / Amplification
CWE: CWE-406 / 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-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Firewall
Status: 🔍

0-Day Time: 🔍

Firewalling: 🔍

Timelineinfo

12/05/2019 🔍
01/29/2020 +55 days 🔍
01/30/2020 +1 days 🔍
03/27/2024 +1518 days 🔍

Sourcesinfo

Advisory: RHSA-2020:0681
Status: Not defined
Confirmation: 🔍

CVE: CVE-2020-2100 (🔍)
GCVE (CVE): GCVE-0-2020-2100
GCVE (VulDB): GCVE-100-149527
See also: 🔍

Entryinfo

Created: 01/30/2020 08:28
Updated: 03/27/2024 14:20
Changes: 01/30/2020 08:28 (41), 01/30/2020 08:33 (18), 03/27/2024 14:20 (17)
Complete: 🔍
Cache ID: 216::103