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Deserialization of Untrusted Data The advisory has been revoked - it doesn't affect any version of package apache-log4j1.2  (opens in a new tab)

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
69.98% (100th percentile)

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  • Snyk IDSNYK-UBUNTU2004-APACHELOG4J12-641856
  • published21 Dec 2019
  • disclosed20 Dec 2019
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Introduced: 20 Dec 2019

CVE-2019-17571  (opens in a new tab)
CWE-502  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache-log4j1.2 package and not the apache-log4j1.2 package as distributed by Ubuntu.

Included in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17.

References