# CVE-2023-2905: swupdate: Due to a failure in validating the length of a provided MQTT_CMD_PUBLISH parsed message with a variable length header...

CVE-2023-2905 is fixed in swupdate on 1 platform, first by DEBIAN-CVE-2023-2905, released August 9, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-2905
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0101
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 9, 2023

## Description

Due to a failure in validating the length of a provided MQTT_CMD_PUBLISH parsed message with a variable length header, Cesanta Mongoose, an embeddable web server, version 7.10 is susceptible to a heap-based buffer overflow vulnerability in the default configuration. Version 7.9 and prior does not appear to be vulnerable. This issue is resolved in version 7.11.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | swupdate Debian 13.5 (trixie) | 2024.12+dfsg-1 | [DEBIAN-CVE-2023-2905](https://patchblox.com/security/data/fix/linux/debian-cve-2023-2905.md) | Aug 9, 2023 |
| Linux | swupdate Debian 14 | 2024.12+dfsg-1 | [DEBIAN-CVE-2023-2905](https://patchblox.com/security/data/fix/linux/debian-cve-2023-2905.md) | Aug 9, 2023 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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