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AUSCERT External Security Bulletin Redistribution
ESB-2022.0125
USN-5222-1: Apache Log4j 2 vulnerabilities
12 January 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Apache Log4j2
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-45105 CVE-2021-44832
Reference: ASB-2021.0244.6
ESB-2022.0091
ESB-2022.0090
ESB-2022.0086
Original Bulletin:
https://ubuntu.com/security/notices/USN-5222-1
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USN-5222-1: Apache Log4j 2 vulnerabilities
11 January 2022
Several security issues were fixed in Apache Log4j 2.
Releases
o Ubuntu 21.10
o Ubuntu 21.04
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o apache-log4j2 - Apache Log4j - Logging Framework for Java
Details
It was discovered that Apache Log4j 2 was vulnerable to remote code
execution (RCE) attack when configured to use a JDBC Appender with a
JNDI LDAP data source URI. A remote attacker could possibly use this issue to
cause a crash, leading to a denial of service.(CVE-2021-44832)
Hideki Okamoto and Guy Lederfein discovered that Apache Log4j 2 did not
protect against infinite recursion in lookup evaluation. A remote attacker
could possibly use this issue to cause Apache Log4j 2 to crash, leading to
a denial of service. This issue only affected Ubuntu 18.04 LTS.
(CVE-2021-45105)
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.10
o liblog4j2-java - 2.17.1-0.21.10.1
Ubuntu 21.04
o liblog4j2-java - 2.17.1-0.21.04.1
Ubuntu 20.04
o liblog4j2-java - 2.17.1-0.20.04.1
Ubuntu 18.04
o liblog4j2-java - 2.12.4-0ubuntu0.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-44832
o CVE-2021-45105
Related notices
o USN-5203-1 : liblog4j2-java, apache-log4j2, liblog4j2-java-doc
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