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GHSA-p6xc-xr62-6r2g

Apache Log4j2 vulnerable to Improper Input Validation and Uncontrolled Recursion

Source: GitHub Advisory Database (reviewed) High CVE-2021-45105

Packages

EcosystemPackageAffectedFixed in
Maven org.apache.logging.log4j:log4j-core >= 2.4.0, < 2.12.3 2.12.3
Maven org.apache.logging.log4j:log4j-core >= 2.13.0, < 2.17.0 2.17.0
Maven org.apache.logging.log4j:log4j-core < 2.3.1 2.3.1
Maven org.ops4j.pax.logging:pax-logging-log4j2 >= 1.8.0, < 1.9.2 1.9.2
Maven org.ops4j.pax.logging:pax-logging-log4j2 >= 1.10.0, < 1.10.9 1.10.9
Maven org.ops4j.pax.logging:pax-logging-log4j2 >= 1.11.0, < 1.11.12 1.11.12
Maven org.ops4j.pax.logging:pax-logging-log4j2 >= 2.0.0, < 2.0.13 2.0.13

Details

As written in the advisory (Markdown source, shown as plain text).

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. # 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.

References

External links from the advisory. They lead to third-party sites.