In Apache Log4j 2.x before 2.8.2, when using the TCP socket server or UDP socket server to receive serialized log events from another application, a specially crafted binary payload can be sent that, when deserialized, can execute arbitrary code.
PoC: CVE-2017-5645
CVE-2017-5645 - Apache Log4j RCE due Insecure Deserialization
PoC: log4shell-finder
Fastest filesystem scanner for log4shell (CVE-2021-44228, CVE-2021-45046) and other vulnerable (CVE-2017-5645, CVE-2019-17571, CVE-2022-23305, CVE-2022-23307 ... ) instances of log4j library. Excellent performance and low memory footprint.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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