Attacker Value
Very High
(1 user assessed)
Exploitability
High
(1 user assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
1

CVE-2021-21307

Disclosure Date: February 11, 2021
Exploited in the Wild
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Lucee Server is a dynamic, Java based (JSR-223), tag and scripting language used for rapid web application development. In Lucee Admin before versions 5.3.7.47, 5.3.6.68 or 5.3.5.96 there is an unauthenticated remote code exploit. This is fixed in versions 5.3.7.47, 5.3.6.68 or 5.3.5.96. As a workaround, one can block access to the Lucee Administrator.

Add Assessment

1
Ratings
  • Attacker Value
    Very High
  • Exploitability
    High
Technical Analysis

This is another of those products I hadn’t ever heard of before we started hearing about compromises. There’s a Metasploit module available here, hence the relatively high exploitability rating: https://github.com/rapid7/metasploit-framework/pull/15525

Mitigation is to lock down admin access, sensibly: https://dev.lucee.org/t/lucee-vulnerability-alert-november-2020-cve-2021-21307/7643

CVSS V3 Severity and Metrics
Base Score:
9.8 Critical
Impact Score:
5.9
Exploitability Score:
3.9
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • lucee

Products

  • lucee server

Exploited in the Wild

Reported by:
Technical Analysis