# CVE-2021-42550: logback: In logback version 1.2.7 and prior versions, an attacker with the required privileges to edit configurations files co...

CVE-2021-42550 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2021-42550, released December 16, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-42550
- Priority: Routine
- CVSS: 6.6 (medium)
- EPSS: 0.0477
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2021

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libdb rocky 8 | 0:5.3.28-42.el8_4 | [RLSA-2022:5498](https://patchblox.com/security/data/fix/linux/rlsa-2022-5498.md) | Jul 5, 2022 |
| Linux | liblogback-java Ubuntu 18.04.6 LTS (bionic) | 1:1.2.3-2ubuntu1~18.04.1+esm1 | [liblogback-java 1:1.2.3-2ubuntu1~18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-liblogback-java-1-1.2.3-2ubuntu1-18.04.1-esm1.md) | Nov 29, 2023 |
| Linux | liblogback-java Ubuntu 20.04 LTS (focal) | 1:1.2.3-5ubuntu0.1~esm1 | [liblogback-java 1:1.2.3-5ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-liblogback-java-1-1.2.3-5ubuntu0.1-esm1.md) | Nov 29, 2023 |
| Linux | logback Debian 12.15 (bookworm) | 1:1.2.8-1 | [DEBIAN-CVE-2021-42550](https://patchblox.com/security/data/fix/linux/debian-cve-2021-42550.md) | Dec 16, 2021 |
| Linux | logback Debian 13.5 (trixie) | 1:1.2.8-1 | [DEBIAN-CVE-2021-42550](https://patchblox.com/security/data/fix/linux/debian-cve-2021-42550.md) | Dec 16, 2021 |
| Linux | logback Debian 14 | 1:1.2.8-1 | [DEBIAN-CVE-2021-42550](https://patchblox.com/security/data/fix/linux/debian-cve-2021-42550.md) | Dec 16, 2021 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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