CVE-2021-45105

medium Apache
CVSS v3 Base Score
5.9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
74.5%
Exploitation probability in 30 days
Top 1% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
None
Availability
High
Published: December 18, 2021 (1665 days ago)
Last Modified: May 29, 2026
Vendor: Apache
Source: NVD

Description

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) did not protect from uncontrolled recursion from self-referential lookups. This allows an attacker with control over Thread Context Map data to cause a denial of service when a crafted string is interpreted. This issue was fixed in Log4j 2.17.0, 2.12.3, and 2.3.1.

CWE

CWE-20

Affected Products

apache log4jnetapp cloud managerdebian debian linuxsonicwall email securitysonicwall network security managersonicwall web application firewallsonicwall 6bk1602-0aa12-0tp0 firmwaresonicwall 6bk1602-0aa22-0tp0 firmwaresonicwall 6bk1602-0aa32-0tp0 firmwaresonicwall 6bk1602-0aa42-0tp0 firmware

References

🔗 www.openwall.com 🔗 cert-portal.siemens.com 🔗 cert-portal.siemens.com 🔗 logging.apache.org 🔗 psirt.global.sonicwall.com