# CVE-2022-41721: golang-golang-x-net: A request smuggling attack is possible when using MaxBytesHandler

CVE-2022-41721 is fixed in golang-golang-x-net on 1 platform, first by DEBIAN-CVE-2022-41721, released January 13, 2023. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-41721
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0182
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jan 13, 2023

## Description

A request smuggling attack is possible when using MaxBytesHandler. When using MaxBytesHandler, the body of an HTTP request is not fully consumed. When the server attempts to read HTTP2 frames from the connection, it will instead be reading the body of the HTTP request, which could be attacker-manipulated to represent arbitrary HTTP2 requests.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | golang-golang-x-net Debian 12.15 (bookworm) | 1:0.4.0+dfsg-1 | [DEBIAN-CVE-2022-41721](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41721.md) | Jan 13, 2023 |
| Linux | golang-golang-x-net Debian 13.5 (trixie) | 1:0.4.0+dfsg-1 | [DEBIAN-CVE-2022-41721](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41721.md) | Jan 13, 2023 |
| Linux | golang-golang-x-net Debian 14 | 1:0.4.0+dfsg-1 | [DEBIAN-CVE-2022-41721](https://patchblox.com/security/data/fix/linux/debian-cve-2022-41721.md) | Jan 13, 2023 |

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