Apache log4j up to 2.14.1 JNDI LDAP Server Lookup Log4Shell/LogJam deserialization

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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Apache log4j up to 2.14.1 and classified as very critical. Affected by this issue is some unknown functionality of the component JNDI LDAP Server Lookup Handler. The manipulation leads to deserialization. This vulnerability is referenced as CVE-2021-44228. Remote exploitation of the attack is possible. Furthermore, an exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apache log4j up to 2.14.1 and classified as very critical. This issue affects an unknown part of the component JNDI LDAP Server Lookup Handler. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.

The weakness was published 12/10/2021. The advisory is shared at lunasec.io. The identification of this vulnerability is CVE-2021-44228. Technical details are unknown but a public exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/20/2026).

The exploit is available at github.com. It is declared as attacked. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 216682 (RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.1.9 on RHEL 7 (RHSA-2025:1746)), which helps to determine the existence of the flaw in a target environment. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 12/10/2021 with a due date of 12/24/2021:

For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/us

Upgrading to version 2.15.0 eliminates this vulnerability. The upgrade is hosted for download at logging.apache.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. It is possible to mitigate the problem by applying the configuration setting log4j2.formatMsgNoLookups = true. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Exploit-DB (51183) and Tenable (216682). access.redhat.com is providing further details. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Apache Log4j
  • Apple Xcode
  • Bentley Synchro
  • Bentley Synchro 4d
  • Cisco Advanced Malware Protection Virtual Private Cloud Appliance
  • Cisco Automated Subsea Tuning
  • Cisco Broadworks
  • Cisco Business Process Automation
  • Cisco Cloud Connect
  • Cisco Cloudcenter
  • Cisco Cloudcenter Cost Optimizer
  • Cisco Cloudcenter Suite
  • Cisco Cloudcenter Suite Admin
  • Cisco Cloudcenter Workload Manager
  • Cisco Common Services Platform Collector
  • Cisco Connected Analytics For Network Deployment
  • Cisco Connected Mobile Experiences
  • Cisco Contact Center Domain Manager
  • Cisco Contact Center Management Portal
  • Cisco Crosswork Data Gateway
  • Cisco Crosswork Network Automation
  • Cisco Crosswork Network Controller
  • Cisco Crosswork Optimization Engine
  • Cisco Crosswork Platform Infrastructure
  • Cisco Crosswork Zero Touch Provisioning
  • Cisco Customer Experience Cloud Agent
  • Cisco Cx Cloud Agent
  • Cisco Cyber Vision
  • Cisco Cyber Vision Sensor Management Extension
  • Cisco Data Center Network Manager
  • Cisco Dna Center
  • Cisco Dna Spaces
  • Cisco Dna Spaces Connector
  • Cisco Emergency Responder
  • Cisco Enterprise Chat And Email
  • Cisco Evolved Programmable Network Manager
  • Cisco Finesse
  • Cisco Firepower 1010
  • Cisco Firepower 1120
  • Cisco Firepower 1140
  • Cisco Firepower 1150
  • Cisco Firepower 2110
  • Cisco Firepower 2120
  • Cisco Firepower 2130
  • Cisco Firepower 2140
  • Cisco Firepower 4110
  • Cisco Firepower 4112
  • Cisco Firepower 4115
  • Cisco Firepower 4120
  • Cisco Firepower 4125
  • Cisco Firepower 4140
  • Cisco Firepower 4145
  • Cisco Firepower 4150
  • Cisco Firepower 9300
  • Cisco Firepower Threat Defense
  • Cisco Fog Director
  • Cisco Fxos
  • Cisco Identity Services Engine
  • Cisco Integrated Management Controller Supervisor
  • Cisco Intersight Virtual Appliance
  • Cisco Iot Operations Dashboard
  • Cisco Mobility Services Engine
  • Cisco Network Assurance Engine
  • Cisco Network Dashboard Fabric Controller
  • Cisco Network Insights For Data Center
  • Cisco Network Services Orchestrator
  • Cisco Nexus Dashboard
  • Cisco Nexus Insights
  • Cisco Optical Network Controller
  • Cisco Packaged Contact Center Enterprise
  • Cisco Paging Server
  • Cisco Prime Service Catalog
  • Cisco Sd-wan Vmanage
  • Cisco Smart Phy
  • Cisco Ucs Central
  • Cisco Ucs Central Software
  • Cisco Ucs Director
  • Cisco Unified Communications Manager
  • Cisco Unified Communications Manager Im & Presence Service
  • Cisco Unified Communications Manager Im And Presence Service
  • Cisco Unified Computing System
  • Cisco Unified Contact Center Enterprise
  • Cisco Unified Contact Center Express
  • Cisco Unified Contact Center Management Portal
  • Cisco Unified Customer Voice Portal
  • Cisco Unified Intelligence Center
  • Cisco Unified Sip Proxy
  • Cisco Unified Workforce Optimization
  • Cisco Unity Connection
  • Cisco Video Surveillance Manager
  • Cisco Video Surveillance Operations Manager
  • Cisco Virtual Topology System
  • Cisco Virtualized Infrastructure Manager
  • Cisco Virtualized Voice Browser
  • Cisco Wan Automation Engine
  • Cisco Webex Meetings Server
  • Cisco Workload Optimization Manager
  • Debian Debian Linux
  • Fedoraproject Fedora
  • Intel Audio Development Kit
  • Intel Computer Vision Annotation Tool
  • Intel Data Center Manager
  • Intel Genomics Kernel Library
  • Intel Oneapi Sample Browser
  • Intel Secure Device Onboard
  • Intel Sensor Solution Firmware Development Kit
  • Intel System Debugger
  • Intel System Studio
  • Netapp Active Iq Unified Manager
  • Netapp Cloud Insights
  • Netapp Cloud Manager
  • Netapp Cloud Secure Agent
  • Netapp Oncommand Insight
  • Netapp Ontap Tools
  • Netapp Snapcenter
  • Percussion Rhythmyx
  • Siemens Captial
  • Siemens Comos
  • Siemens Desigo Cc Advanced Reports
  • Siemens Desigo Cc Info Center
  • Siemens E-car Operation Center
  • Siemens Energy Engage
  • Siemens Energyip
  • Siemens Energyip Prepay
  • Siemens Gma-manager
  • Siemens Head-end System Universal Device Integration System
  • Siemens Industrial Edge Management
  • Siemens Industrial Edge Management Hub
  • Siemens Logo! Soft Comfort
  • Siemens Mendix
  • Siemens Mindsphere
  • Siemens Navigator
  • Siemens Nx
  • Siemens Opcenter Intelligence
  • Siemens Operation Scheduler
  • Siemens Sentron Powermanager
  • Siemens Siguard Dsa
  • Siemens Sipass Integrated
  • Siemens Siveillance Command
  • Siemens Siveillance Control Pro
  • Siemens Siveillance Identity
  • Siemens Siveillance Vantage
  • Siemens Siveillance Viewpoint
  • Siemens Solid Edge Cam Pro
  • Siemens Solid Edge Harness Design
  • Siemens Spectrum Power 4
  • Siemens Spectrum Power 7
  • Siemens Sppa-t3000 Ses3000
  • Siemens Sppa-t3000 Ses3000 Firmware
  • Siemens Teamcenter
  • Siemens Vesys
  • Siemens Xpedition Enterprise
  • Siemens Xpedition Package Integrator
  • Snowsoftware Snow Commander
  • Snowsoftware Vm Access Proxy
  • Sonicwall Email Security

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 9.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 10.0
NVD Vector: 🔍

ADP CISA Base Score: 10.0
ADP CISA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
KEV Notice: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 216682
Nessus Name: RHEL 7 : Red Hat JBoss Enterprise Application Platform 7.1.9 on RHEL 7 (RHSA-2025:1746)

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: log4j 2.15.0
Patch: github.com
Config: log4j2.formatMsgNoLookups = true

Timelineinfo

11/26/2021 🔍
12/10/2021 +14 days 🔍
12/10/2021 +0 days 🔍
02/20/2026 +1533 days 🔍

Sourcesinfo

Vendor: apache.org

Advisory: dsa-5020
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-44228 (🔍)
GCVE (CVE): GCVE-0-2021-44228
GCVE (VulDB): GCVE-100-187925
scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 12/10/2021 09:19
Updated: 02/20/2026 17:25
Changes: 12/10/2021 09:19 (39), 12/10/2021 11:39 (10), 12/10/2021 15:26 (1), 12/10/2021 16:45 (2), 12/13/2021 11:20 (4), 12/15/2021 14:31 (4), 12/15/2021 14:35 (19), 12/15/2021 14:38 (1), 10/14/2023 08:15 (2), 04/22/2024 10:49 (27), 07/25/2024 01:11 (1), 08/12/2024 08:31 (1), 09/16/2024 16:57 (2), 02/24/2025 19:41 (2), 10/27/2025 18:55 (1), 02/20/2026 17:25 (11)
Complete: 🔍
Submitter: CSieberg
Cache ID: 216::103

Submitinfo

Accepted

Duplicate

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

 rochevm (+0)
5 years ago
Can you confirm this statement? "There is a new log4j release 2.15.0-rc2, as the previous -rc1 can be bypassed."

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