Date: Wed, 18 Dec 2019 21:21:19 -0600 From: Matt Sicker <mattsicker@...che.org> To: oss-security@...ts.openwall.com Subject: [CVE-2019-17571] Apache Log4j 1.2 deserialization of untrusted data in SocketServer CVE-2019-17571: Deserialization of untrusted data in SocketServer Severity: Critical CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/RL:W Product: Apache Log4j Versions Affected: Apache Log4j up to and including 1.2.27. Separately fixed by CVE-2017-5645 in Log4j 2.8.2. Problem type: CWE-502: Deserialization of Untrusted Data Description: 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. Mitigation: Apache Log4j 1.2 reached end of life in August 2015. Users should upgrade to Log4j 2.x which both addresses that vulnerability as well as numerous other issues in the previous versions. Credit: This issue was initially discovered in CVE-2017-5645 by Marcio Almeida de Macedo of Red Team at Telstra. Links: https://logging.apache.org/log4j/1.2/ https://issues.apache.org/jira/browse/LOG4J2-1863 -- Matt Sicker Secretary, Apache Software Foundation VP Logging Services, ASF
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