← gociux.comall exploited CVEs

Exploited vulnerability · CISA KEV

Is CVE-2021-44228 exploited? Yes: in CISA KEV since 10 Dec 2021

Gociux · Apache Log4j2 · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2021-44228, Apache Log4j2 Remote Code Execution Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 10 Dec 2021, the day it was published. It is known to be used in ransomware campaigns. It affects Apache Log4j2. If you run it, CISA's required action is: 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/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.

exploitedYesCISA KEV · 10 Dec 2021
ransomwareKnownused in campaigns
EPSStop 1%among the most likely CVEs to be exploited
severity10CVSS 3.1 · critical
US federal due24 Dec 2021BOD 22-01 deadline

What it is

Apache Log4j2 contains a vulnerability where JNDI features do not protect against attacker-controlled JNDI-related endpoints, allowing for remote code execution.

VendorApache (41 exploited CVEs in KEV)
ProductLog4j2
VulnerabilityApache Log4j2 Remote Code Execution Vulnerability
WeaknessCWE-20, CWE-400, CWE-502
Published10 Dec 2021
Added to KEV10 Dec 2021
Reported by (CNA)apache

What to do

  1. Check whether you run it. Look for Log4j2 in your asset inventory, including appliances and cloud images. Stack check lists every exploited Apache CVE at once.
  2. Apply the fix. 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/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 10 Dec 2021.
  4. Get told next time. Email alerts when CISA adds a CVE for Apache.

Other exploited CVEs in Log4j2

References

Questions

Is CVE-2021-44228 being exploited?

Yes. CISA added CVE-2021-44228 to the Known Exploited Vulnerabilities catalog on 10 Dec 2021, which means there is reliable evidence of exploitation in the wild.

Is CVE-2021-44228 used in ransomware attacks?

Yes, CISA lists it as known to be used in ransomware campaigns.

How do I fix CVE-2021-44228?

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/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available. Check Apache's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Log4j2 and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in December 2021 · Apache scorecard · act-now radar.

Running Apache in a regulated environment?

We check exposure across your estate, patch or mitigate with your team, and set up detection for what attackers do after exploiting it.

Get in touch →