#VU73244 Resource exhaustion in Apache Log4j - CVE-2023-26464
Published: March 10, 2023
Vulnerability identifier: #VU73244
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2023-26464
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Apache Log4j
Apache Log4j
Software vendor:
Apache Foundation
Apache Foundation
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources. When using the Chainsaw or SocketAppender components with Log4j 1.x on JRE less than 1.7, an attacker that manages to cause a logging entry involving a specially-crafted (i.e., deeply nested) hashmap or hashtable (depending on which logging component is in use) to be processed can exhaust the available memory in the virtual machine and achieve denial of service when the object is deserialized.
Remediation
Install updates from vendor's website.