CVE-2021-45046
Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack
Exploited in the wild. In CISA KEV since 2023‑05‑01. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
Incomplete fix for Apache Log4j vulnerability
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2023-05-01.
US federal agencies must remediate by 2023-05-22.
Known use in ransomware campaigns.
Apply updates per vendor instructions.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
100% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
9 events over 1654 days, from the signal feeds we watch.
- OpenVAS check added
- Nuclei check added
- Patch availableworkaround available, record updated
- Added to CISA KEVransomware campaign
- Publishedweakness classified, att&ck mapped
Affected products
- OpenShift Container PlatformOperating Systems / linux-distro
- Jboss FuseOperating Systems / linux-distro
- JBoss Enterprise Application PlatformOperating Systems / linux-distro
- OpenShift Application RuntimesOperating Systems / linux-distro
- JBoss A-MQ StreamingOperating Systems / linux-distro
- Data GridOperating Systems / linux-distro
- Red Hat Process AutomationOperating Systems / linux-distro
- Red Hat Integration Camel KOperating Systems / linux-distro
And 46 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Scored 9.0 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- nvd.nist.gov/vuln/detail/CVE-2021-45046
- oracle.com/security-alerts/cpujul2022.html
- oracle.com/security-alerts/cpujan2022.html
And 35 more references. See all after sign-in
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