CVE-2020-17496 : vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWid

vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. NOTE: this issue exists because of an incomplete fix for CVE-2019-16759.

Published 2020-08-12 14:15:13

Updated 2022-10-26 13:58:42

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2020-17496

Vbulletin » Vbulletin
Versions from including (>=) 5.5.4 and up to, including, (<=) 5.6.2
cpe:2.3:a:vbulletin:vbulletin:*:*:*:*:*:*:*:*
Matching versions

CVE-2020-17496 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:

vBulletin PHP Module Remote Code Execution Vulnerability

CISA required action:

Apply updates per vendor instructions.

CISA description:

The PHP module within vBulletin contains an unspecified vulnerability that allows for remote code execution via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. This CVE ID resolves an incomplete patch for CVE-2019-16759.

Notes:

https://nvd.nist.gov/vuln/detail/CVE-2020-17496

Added on 2021-11-03 Action due date 2022-05-03

Exploit prediction scoring system (EPSS) score for CVE-2020-17496

EPSS FAQ

97.48%

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

~ 100 %

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

Metasploit modules for CVE-2020-17496

vBulletin 5.x /ajax/render/widget_tabbedcontainer_tab_panel PHP remote code execution.

Disclosure Date: 2020-08-09

First seen: 2020-08-12

exploit/multi/http/vbulletin_widget_template_rce

This module exploits a logic bug within the template rendering code in vBulletin 5.x. The module uses the vBulletin template rendering functionality to render the 'widget_tabbedcontainer_tab_panel' template while also providing the 'widget_php' argument. This

More information

CVSS scores for CVE-2020-17496

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2020-17496

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-17496

https://forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4445227-vbulletin-5-6-0-5-6-1-5-6-2-security-patch

vBulletin 5.6.0, 5.6.1, 5.6.2 Security Patch - vBulletin Community Forum
Patch;Vendor Advisory

CVEs referencing this url
https://cwe.mitre.org/data/definitions/78.html

CWE - CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') (4.0)
Technical Description

CVEs referencing this url
https://blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/

Exploitee.rs » Blog Archive » Exploiting vBulletin: “A Tale of a Patch Fail”
Exploit;Third Party Advisory

CVEs referencing this url
https://seclists.org/fulldisclosure/2020/Aug/5

Full Disclosure: Remote Code Execution 0day in vBulletin 5.x
Exploit;Mailing List;Third Party Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2020-17496