VDB-187283 · CVE-2021-4020 · GCVE-0-2021-4020

janus-gateway Web Page Generation cross site scripting

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.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in janus-gateway. It has been classified as problematic. This affects an unknown function of the component Web Page Generation Handler. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2021-4020. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in janus-gateway (unknown version). This issue affects an unknown code block of the component Web Page Generation Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity.

The weakness was presented 11/27/2021. It is possible to read the advisory at huntr.dev. The identification of this vulnerability is CVE-2021-4020 since 11/25/2021. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Applying the patch d3fc00ec803d6c41d8f98908732f44e7f4911a1c is able to eliminate this problem. The bugfix is ready for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

janus-gateway

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 8.8
CNA Vector (huntr.dev): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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: Patch
Status: 🔍

0-Day Time: 🔍

Patch: d3fc00ec803d6c41d8f98908732f44e7f4911a1c

Timelineinfo

11/25/2021 🔍
11/27/2021 +2 days 🔍
11/27/2021 +0 days 🔍
12/02/2021 +5 days 🔍

Sourcesinfo

Advisory: d3fc00ec803d6c41d8f98908732f44e7f4911a1c
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-4020 (🔍)
GCVE (CVE): GCVE-0-2021-4020
GCVE (VulDB): GCVE-100-187283

Entryinfo

Created: 11/27/2021 18:23
Updated: 12/02/2021 12:39
Changes: 11/27/2021 18:23 (48), 12/02/2021 12:25 (3), 12/02/2021 12:32 (18), 12/02/2021 12:39 (1)
Complete: 🔍
Cache ID: 216::103