Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2021-45046

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
14/12/2021
Last modified:
27/10/2025

Description

It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-default Pattern Layout with either a Context Lookup (for example, $${ctx:loginId}) or a Thread Context Map pattern (%X, %mdc, or %MDC) to craft malicious input data using a JNDI Lookup pattern resulting in an information leak and remote code execution in some environments and local code execution in all environments. Log4j 2.16.0 (Java 8) and 2.12.2 (Java 7) fix this issue by removing support for message lookup patterns and disabling JNDI functionality by default.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.00 CRITICAL
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
9.00
Severity 3.x
CRITICAL
Vector 2.0
AV:N/AC:H/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.10 MEDIUM
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): High
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
5.10
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:* 2.0.1 (including) 2.12.2 (excluding)
cpe:2.3:a:apache:log4j:*:*:*:*:*:*:*:* 2.13.0 (including) 2.16.0 (excluding)
cpe:2.3:a:apache:log4j:2.0:-:*:*:*:*:*:*
cpe:2.3:a:apache:log4j:2.0:beta9:*:*:*:*:*:*
cpe:2.3:a:apache:log4j:2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:apache:log4j:2.0:rc2:*:*:*:*:*:*
cpe:2.3:a:cvat:computer_vision_annotation_tool:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:audio_development_kit:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:datacenter_manager:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:genomics_kernel_library:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:oneapi:-:*:*:*:*:eclipse:*:*
cpe:2.3:a:intel:secure_device_onboard:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:sensor_solution_firmware_development_kit:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:system_debugger:-:*:*:*:*:*:*:*
cpe:2.3:a:intel:system_studio:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools