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AUSCERT External Security Bulletin Redistribution
ESB-2022.0188
USN-5223-1: Apache Log4j 1.2 vulnerability
14 January 2022
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AusCERT Security Bulletin Summary
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Product: Apache log4j
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-4104
Reference: ESB-2022.0151
ESB-2022.0090
ESB-2022.0070
ESB-2022.0030
Original Bulletin:
https://ubuntu.com/security/notices/USN-5223-1
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USN-5223-1: Apache Log4j 1.2 vulnerability
12 January 2022
Apache Log4j 1.2 could be made to crash or run programs if it received specially
crafted input.
Releases
o Ubuntu 21.10
o Ubuntu 21.04
o Ubuntu 20.04 LTS
o Ubuntu 18.04 LTS
Packages
o apache-log4j1.2 - Java-based open-source logging tool
Details
It was discovered that Apache Log4j 1.2 was vulnerable to deserialization of
untrusted data if the configuration file was editable. An attacker could use
this vulnerability to cause a DoS or possibly execute arbitrary code.
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.10
o liblog4j1.2-java - 1.2.17-10ubuntu0.21.10.1
Ubuntu 21.04
o liblog4j1.2-java - 1.2.17-10ubuntu0.21.04.1
Ubuntu 20.04
o liblog4j1.2-java - 1.2.17-9ubuntu0.1
Ubuntu 18.04
o liblog4j1.2-java - 1.2.17-8+deb10u1ubuntu0.1
In general, a standard system update will make all the necessary changes.
References
o CVE-2021-4104
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