// For flags

CVE-2023-26464

Apache Log4j 1.x (EOL) allows DoS in Chainsaw and SocketAppender

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Attend
*SSVC
Descriptions

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 (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. This issue affects Apache Log4j before 2. Affected users are recommended to update to Log4j 2.x. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

A flaw was found in Chainsaw and SocketAppender components with Log4j 1.x on JRE, less than 1.7. This issue may allow an attacker to use a logging entry with a specially-crafted hashmap or hashtable, depending on which logging component is in use, to process and exhaust the available memory in the virtual machine, resulting in a Denial of Service when the object is deserialized. This issue affects Apache Log4j before version 2.

** UNSUPPORTED WHEN ASSIGNED ** 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 (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. This issue affects Apache Log4j before 2. Affected users are recommended to update to Log4j 2.x. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Red Hat JBoss Enterprise Application Platform 7 is a platform for Java applications based on the WildFly application runtime. This release of Red Hat JBoss Enterprise Application Platform 7.4.13 serves as a replacement for Red Hat JBoss Enterprise Application Platform 7.4.12 and includes bug fixes and enhancements. See the Red Hat JBoss Enterprise Application Platform 7.4.13 Release Notes for information about the most significant bug fixes and enhancements included in this release. Issues addressed include denial of service and deserialization vulnerabilities.

*Credits: Garrett Tucker of Red Hat
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Attend
Exploitation
None
Automatable
Yes
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2023-02-23 CVE Reserved
  • 2023-03-10 CVE Published
  • 2025-02-13 CVE Updated
  • 2025-05-15 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-400: Uncontrolled Resource Consumption
  • CWE-502: Deserialization of Untrusted Data
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apache
Search vendor "Apache"
 Log4j
Search vendor "Apache" for product "Log4j"
 >= 1.0.4 < 2.0
Search vendor "Apache" for product "Log4j" and version " >= 1.0.4 < 2.0"
-
Affected
* End Of Life in some or all products. Do not expect updates.