CVE-2021-44832CWE-20CWE-74

Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration

Medium · published December 28, 2021

Patch now

High probability of exploitation

CVSS calls it medium at 6.6. It sits in the 99.9th percentile for exploit probability.

CVSS v3.1
6.6
EPSS
98%
Percentile
99.9
In the wild
Unconfirmed
What it is

Apache Log4j2 versions 2.0-beta7 through 2.17.0 (excluding security fix releases 2.3.2 and 2.12.4) are vulnerable to a remote code execution (RCE) attack when a configuration uses a JDBC Appender with a JNDI LDAP data source URI when an attacker has control of the target LDAP server. This issue is fixed by limiting JNDI data source names to the java protocol in Log4j2 versions 2.17.1, 2.12.4, and 2.3.2.

The record
Technical detail
CVSS v3.1
6.6 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.97906 · 99.9th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2021-12-28T19:35Z
EPSS history
Timeline
  • 28 DEC 19:35Z
    Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration
    cvelistv5