CVE-2023-26464CWE-502

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

High · published March 10, 2023

CVSS v3.1
7.5
EPSS
2%
Percentile
79.6
In the wild
Unconfirmed
What it is

** 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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01905 · 79.6th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2023-03-10T13:38Z
EPSS history
Timeline
  • 10 MAR 13:38Z
    Apache Log4j 1.x (EOL) allows DoS in Chainsaw and SocketAppender
    cvelistv5