# CVE-2018-1285: liblog4net1.2-cil: Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files

CVE-2018-1285 is fixed in liblog4net1.2-cil on 1 platform, first by liblog4net1.2-cil 1.2.10+dfsg-7ubuntu0.18.04.1, released May 11, 2020. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-1285
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.1782
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 11, 2020

## Description

Apache log4net versions before 2.0.10 do not disable XML external entities when parsing log4net configuration files. This allows for XXE-based attacks in applications that accept attacker-controlled log4net configuration files.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | liblog4net1.2-cil Ubuntu 18.04.6 LTS (bionic) | 1.2.10+dfsg-7ubuntu0.18.04.1 | [liblog4net1.2-cil 1.2.10+dfsg-7ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-liblog4net1.2-cil-1.2.10-dfsg-7ubuntu0.18.04.1.md) | May 11, 2020 |
| Linux | liblog4net1.2-cil Ubuntu 20.04 LTS (focal) | 1.2.10+dfsg-7ubuntu0.20.04.1 | [liblog4net1.2-cil 1.2.10+dfsg-7ubuntu0.20.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-liblog4net1.2-cil-1.2.10-dfsg-7ubuntu0.20.04.1.md) | May 11, 2020 |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo