Summary
On 2021-12-09, a vulnerability in Apache Log4j (a logging tool used in many Java-based applications) was disclosed, that could allow remote unauthenticated attackers to execute code on vulnerable systems. The vulnerability is tracked as CVE-2021-44228 and is also known as "Log4Shell".
On 2021-12-14 an additional denial of service vulnerability (CVE-2021-45046) was published rendering the initial mitigations and fix in version 2.15.0 as incomplete under certain non-default configurations. Log4j versions 2.16.0 and 2.12.2 are supposed to fix both vulnerabilities.
On 2021-12-17, CVE-2021-45046 was reclassified with an increased CVSS base score (from 3.7 to 9.0). The potential impact of CVE-2021-45046 now includes - besides denial of service - also information disclosure and local (and potential remote) code execution. Furthermore, one additional denial of service vulnerability, CVE-2021-45105, was disclosed.
The Siemens Energy Sensformer / Sensgear cloud service was affected by these vulnerabilities and has remediated them. No user actions are necessary.
Vulnerabilities 3
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Critical 10.0
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who …
KEV Dec 10, 2021 -
Critical 9.0
Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack
It was found that the fix to address CVE-2021-44228 in Apache Log4j 2.15.0 was incomplete in certain non-default configurations. This could allows attackers with control over Thread Context Map (MDC) input data when the logging configuration uses a non-defaul…
KEV May 1, 2023 -
Medium 5.9
Apache Log4j2 does not always protect from infinite recursion in lookup evaluation
Apache Log4j2 versions 2.0-alpha1 through 2.16.0 (excluding 2.12.3 and 2.3.1) 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 craf…
Revision history
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#2
Included Sensgear, clarified product name and summary
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#1
Publication Date
References
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SSA-479842: Apache Log4j Vulnerabilities - Impact to Siemens Energy Sensformer / Sensgear (Platform, Basic and Advanced) - PDF Version
https://cert-portal.siemens.com/productcert/pdf/ssa-479842.pdf
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SSA-479842: Apache Log4j Vulnerabilities - Impact to Siemens Energy Sensformer / Sensgear (Platform, Basic and Advanced) - TXT Version
https://cert-portal.siemens.com/productcert/txt/ssa-479842.txt