Test ID:	1.3.6.1.4.1.25623.1.0.117845
Category:	Denial of Service
Title:	Apache Log4j 2.x < 2.17.0 DoS Vulnerability (Linux/Unix, Dec 2021) - Version Check
Summary:	Apache Log4j is prone to a denial of service (DoS); vulnerability.
Description:	Summary: Apache Log4j is prone to a denial of service (DoS) vulnerability. Vulnerability Insight: Apache Log4j2 did not protect from uncontrolled recursion from self-referential lookups. When the logging configuration uses a non-default Pattern Layout with a Context Lookup (for example, $${ctx:loginId}), attackers with control over Thread Context Map (MDC) input data can craft malicious input data that contains a recursive lookup, resulting in a StackOverflowError that will terminate the process. Affected Software/OS: Apache Log4j versions 2.0.x through 2.16.0. Solution: Update to version 2.3.1, 2.12.3, 2.17.0 or later. CVSS Score: 4.3 CVSS Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-45105 CERT/CC vulnerability note: VU#930724 https://www.kb.cert.org/vuls/id/930724 Cisco Security Advisory: 20211210 Vulnerabilities in Apache Log4j Library Affecting Cisco Products: December 2021 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-log4j-qRuKNEbd https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf https://cert-portal.siemens.com/productcert/pdf/ssa-501673.pdf https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0032 https://security.netapp.com/advisory/ntap-20211218-0001/ Debian Security Information: DSA-5024 (Google Search) https://www.debian.org/security/2021/dsa-5024 https://logging.apache.org/log4j/2.x/security.html https://www.oracle.com/security-alerts/cpuapr2022.html https://www.oracle.com/security-alerts/cpujan2022.html https://www.oracle.com/security-alerts/cpujul2022.html https://www.zerodayinitiative.com/advisories/ZDI-21-1541/ http://www.openwall.com/lists/oss-security/2021/12/19/1
Copyright	Copyright (C) 2021 Greenbone Networks GmbH

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