FusionPBX up to 4.5.29 Fax Extension Privilege Escalation

EntryHistoryDiffjsonxmlCTI

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.
5.3	$0-$5k	0.00

A vulnerability, which was classified as problematic, has been found in FusionPBX up to 4.5.29. This issue affects some unknown processing of the component Fax Extension Handler. The impact remains unknown.

The weakness was published 11/06/2021 as 2d2869c1a1e874c46a8c3c5475614ce769bbbd59. The advisory is shared at github.com. The identification of this vulnerability is CVE-2021-43405 since 11/05/2021. Neither technical details nor an exploit are publicly available.

Upgrading to version 4.5.30 eliminates this vulnerability. Applying the patch 2d2869c1a1e874c46a8c3c5475614ce769bbbd59 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Productinfo

Name

FusionPBX

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍

Exploitinginfo

Class: Privilege Escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Partially

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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: FusionPBX 4.5.30
Patch: 2d2869c1a1e874c46a8c3c5475614ce769bbbd59

Timelineinfo

11/05/2021 🔍
11/06/2021 +1 days 🔍
11/06/2021 +0 days 🔍
11/10/2021 +4 days 🔍

Sourcesinfo

Advisory: 2d2869c1a1e874c46a8c3c5475614ce769bbbd59
Status: Confirmed

CVE: CVE-2021-43405 (🔍)

Entryinfo

Created: 11/06/2021 09:45
Updated: 11/10/2021 12:22
Changes: 11/06/2021 09:45 (39), 11/10/2021 12:22 (1)
Complete: 🔍