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Critical severityNVD Advisory· Published Jan 18, 2022· Updated Aug 3, 2024

A deserialization flaw in the Chainsaw component of Log4j 1 can lead to malicious code execution.

CVE-2022-23307

Description

CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw was a component of Apache Log4j 1.2.x where the same issue exists.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

CVE-2022-23307 is a deserialization vulnerability in Apache Chainsaw, formerly part of Log4j 1.2.x, allowing remote code execution.

Vulnerability

CVE-2022-23307 is a deserialization issue present in Apache Chainsaw. Prior to Chainsaw V2.0, Chainsaw was a component of Apache Log4j 1.2.x, where the same vulnerability also exists [1]. Affected versions include all versions of Log4j 1.2.x that include Chainsaw [1]. The vulnerability arises from insecure deserialization of log events, which can be exploited via the application's deserialization functionality [1].

Exploitation

An attacker can exploit this vulnerability by sending a crafted serialized Java object to the Chainsaw component or Log4j 1.2.x code path that processes such objects [1]. The attacker may need network access to the system running the vulnerable software, and no authentication is required if the deserialization endpoint is exposed [1]. By supplying a malicious serialized object, the attacker triggers deserialization without proper validation, leading to execution of arbitrary code [1].

Impact

Successful exploitation allows an attacker to achieve remote code execution (RCE) on the target system [1]. The attacker gains the ability to execute arbitrary commands with the privileges of the vulnerable application, potentially leading to full system compromise [1]. The confidentiality, integrity, and availability of the affected system can be fully compromised [1].

Mitigation

Apache Log4j 1.x reached End of Life on August 5, 2015, and no patches are available for this vulnerability [1]. Users are strongly recommended to upgrade to Apache Log4j 2 (2.x), which is actively maintained [1]. For Chainsaw, users should migrate to Chainsaw V2.0 or later [1]. No workaround or mitigation is provided by the vendor for Log4j 1.x [1].

References
  1. Apache log4j 1.2 -

AI Insight generated on May 21, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
log4j:log4jMaven
<= 1.2.17—
org.zenframework.z8.dependencies.commons:log4j-1.2.17Maven
<= 2.0—

Affected products

180

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

6

News mentions

0

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