vulnerability
Ubuntu: USN-7616-1 (CVE-2021-42550): logback vulnerabilities
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:M/Au:S/C:C/I:C/A:C) | Dec 16, 2021 | Jun 26, 2025 | Aug 18, 2025 |
Severity
9
CVSS
(AV:N/AC:M/Au:S/C:C/I:C/A:C)
Published
Dec 16, 2021
Added
Jun 26, 2025
Modified
Aug 18, 2025
Description
In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files could craft a malicious configuration allowing to execute arbitrary code loaded from LDAP servers.
Solution
ubuntu-pro-upgrade-liblogback-java
References
- CVE-2021-42550
- https://attackerkb.com/topics/CVE-2021-42550
- CWE-502
- UBUNTU-USN-7616-1
- URL-http://logback.qos.ch/news.html
- URL-https://github.com/cn-panda/logbackRceDemo
- URL-https://github.com/qos-ch/logback/commit/21d772f2bc2ed780b01b4fe108df7e29707763f1
- URL-https://jira.qos.ch/browse/LOGBACK-1591
- URL-https://ubuntu.com/security/notices/USN-7616-1
- URL-https://www.cve.org/CVERecord?id=CVE-2021-42550
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