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CVE

CVE-2021-45105

Apache Log4j2 vulnerable to Improper Input Validation and Uncontrolled Recursion
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CVE

CVE-2021-45105

Apache Log4j2 vulnerable to Improper Input Validation and Uncontrolled Recursion

Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3) 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 and 2.12.3.

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Affected packages

Only the org.apache.logging.log4j:log4j-core package is directly affected by this vulnerability. The org.apache.logging.log4j:log4j-api should be kept at the same version as the org.apache.logging.log4j:log4j-core package to ensure compatability if in use.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
-
C
H
U
-
C
H
U
-

Related Resources

No items found.

References

Severity

5.9

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
5.9
EPSS Probability
0.67042%
EPSS Percentile
0.98492%
Introduced Version
2.13.0
Fix Available
2.17.0

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