Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2023-26464
CVE-2023-26464:
Apache Log4j vulnerability analysis and mitigation
Overview
When using the Chainsaw or SocketAppender components with Log4j 1.x on Java Runtime Environment (JRE) versions less than 1.7, an attacker could potentially exploit a vulnerability involving specially-crafted deeply nested hashmaps or hashtables. This vulnerability was discovered and disclosed in February 2023, affecting Apache Log4j versions before 2.x. The issue has been assigned CVE-2023-26464 (CVE Mitre).
Technical details
The vulnerability occurs when processing logging entries containing specially-crafted (deeply nested) hashmaps or hashtables, depending on which logging component is in use. The issue specifically affects the Chainsaw and SocketAppender components in Log4j 1.x when running on JRE versions prior to 1.7. The vulnerability has been assigned a CVSS score of 7.5 (HIGH) with a vector of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (NetApp Advisory).
Impact
When successfully exploited, this vulnerability could lead to exhaustion of available memory in the virtual machine, resulting in a Denial of Service (DoS) condition when the malicious object is deserialized (CVE Mitre).
Mitigation and workarounds
Since this vulnerability affects versions of Log4j 1.x, which is no longer supported, affected users are strongly recommended to upgrade to Log4j 2.x. This is the primary and most effective mitigation strategy (CVE Mitre).
Additional resources
Source: This report was generated using AI
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