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Exploits
ID:7204 - Exploit for Infinite loop in Apache Log4j - CVE-2021-45105
ID:7204 - Exploit for Infinite loop in Apache Log4j - CVE-2021-45105
Published: December 26, 2021
Vulnerability identifier: #VU59051
Vulnerability risk: Medium
CVE-ID: CVE-2021-45105
CWE-ID: CWE-835
Exploitation vector: Remote access
Vulnerable software:
Apache Log4j
Apache Log4j
Link to public exploit:
Vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop within the StrSubstitutor class. A remote attacker can pass specially crafted input to the application, consume all available system resources and cause denial of service conditions.
Payload example: ${${::-${::-$${::-j}}}}
Remediation
Install updates from vendor's website.