CVE-2021-43406 : An issue was discovered in FusionPBX before 4.5.30. The fax_post

An issue was discovered in FusionPBX before 4.5.30. The fax_post_size may have risky characters (it is not constrained to preset values).

Published 2021-11-05 18:15:10

Updated 2021-11-09 18:54:20

Source MITRE

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2021-43406

Fusionpbx » Fusionpbx
Versions before (<) 4.5.30
cpe:2.3:a:fusionpbx:fusionpbx:*:*:*:*:*:*:*:*
Matching versions

EPSS FAQ

0.13%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 48 %

Percentile, the proportion of vulnerabilities that are scored at or less

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.5	MEDIUM	AV:N/AC:L/Au:S/C:P/I:P/A:P	8.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
8.8	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE-20 Improper Input Validation

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.

Assigned by: nvd@nist.gov (Primary)

https://github.com/fusionpbx/fusionpbx/commit/0377b2152c0e59c8f35297f9a9b6ee335a62d963

Force the fax_page_size to only preset allowed values. · fusionpbx/fusionpbx@0377b21 · GitHub
Patch;Third Party Advisory

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