Deserialization of Untrusted Data
CVE-2023-26464
Summary
When using the Chainsaw or SocketAppender components with Log4j versions 1.0.4 prior to 2.0, an attacker that manages to cause a logging entry involving a specially crafted (ie, deeply nested) "hashmap" or "hashtable" (depending on which logging component is in use) to be processed could exhaust the available Memory in the Virtual Machine and achieve Denial of Service when the object is Deserialized. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.
- LOW
- NETWORK
- NONE
- UNCHANGED
- NONE
- NONE
- NONE
- HIGH
CWE-502 - Deserialization of Untrusted Data
Deserialization of untrusted data vulnerabilities enable an attacker to replace or manipulate a serialized object, replacing it with malicious data. When the object is deserialized at the victim's end the malicious data is able to compromise the victim’s system. The exploit can be devastating, its impact may range from privilege escalation, broken access control, or denial of service attacks to allowing unauthorized access to the application's internal code and logic which can compromise the entire system.
References
Advisory Timeline
- Published
