CVE-2021-45046

criticalknown exploitedpublic exploitcovered by 1 sourcefirst seen 2023-05-01

Actively exploited. CVE-2021-45046 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-05-01) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Public exploit code is available. Proof-of-concept or working exploit code for CVE-2021-45046 is indexed in Metasploit, GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.

Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations.

CSIRTS triage

What: There is a deserialization vulnerability that can lead to remote code execution due to an incomplete fix.
Who is affected: Deployments of Apache Log4j2 are affected, particularly in non-default configurations.
Urgency: Remediation is critical as the vulnerability is actively exploited and poses severe risks.
Action: Update to the latest version of Log4j2 to mitigate the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.

Exploit availability

Public exploit or proof-of-concept code for CVE-2021-45046 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.

MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗

Advisory coverage (1)

criticalexploitedCVE-2021-45046: Apache Log4j2 Deserialization of Untrusted Data Vulnerabilitycisa-kev · 2023-05-01

External references

NVD record for CVE-2021-45046

CVE.org record

CISA KEV catalog

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