# CVE-2022-40468: tinyproxy-bin: Potential leak of left-over heap data if custom error page templates containing special non-standard variables are used

CVE-2022-40468 is fixed in 2 products on 1 platform, first by tinyproxy 1.8.4-5ubuntu0.1~esm2, released September 19, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-40468
- Priority: High
- CVSS: 7.5 (Medium)
- EPSS: 0.0190
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 19, 2022

## Description

Potential leak of left-over heap data if custom error page templates containing special non-standard variables are used. Tinyproxy commit 84f203f and earlier use uninitialized buffers in process_request() function.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | tinyproxy Debian 11.6 (bullseye) | 1.10.0-5+deb11u1 | [DLA-3892-1](https://patchblox.com/security/data/fix/linux/dla-3892-1.md) | Sep 18, 2024 |
| Linux | tinyproxy Debian 12.15 (bookworm) | 1.11.1-2 | [DEBIAN-CVE-2022-40468](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40468.md) | Sep 19, 2022 |
| Linux | tinyproxy Debian 13.5 (trixie) | 1.11.1-2 | [DEBIAN-CVE-2022-40468](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40468.md) | Sep 19, 2022 |
| Linux | tinyproxy Debian 14 | 1.11.1-2 | [DEBIAN-CVE-2022-40468](https://patchblox.com/security/data/fix/linux/debian-cve-2022-40468.md) | Sep 19, 2022 |
| Linux | tinyproxy Ubuntu 18.04.6 LTS (bionic) | 1.8.4-5ubuntu0.1~esm2 | [tinyproxy 1.8.4-5ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tinyproxy-1.8.4-5ubuntu0.1-esm2.md) | Sep 19, 2022 |
| Linux | tinyproxy Ubuntu 20.04 LTS (focal) | 1.10.0-4ubuntu0.1 | [tinyproxy 1.10.0-4ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tinyproxy-1.10.0-4ubuntu0.1.md) | Sep 19, 2022 |
| Linux | tinyproxy Ubuntu 22.04.1 LTS (jammy) | 1.11.0-1ubuntu0.1~esm1 | [tinyproxy 1.11.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-tinyproxy-1.11.0-1ubuntu0.1-esm1.md) | Sep 19, 2022 |
| Linux | tinyproxy-bin Ubuntu 18.04.6 LTS (bionic) | 1.8.4-5ubuntu0.1~esm2 | [tinyproxy-bin 1.8.4-5ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-tinyproxy-bin-1.8.4-5ubuntu0.1-esm2.md) | Sep 19, 2022 |
| Linux | tinyproxy-bin Ubuntu 20.04 LTS (focal) | 1.10.0-4ubuntu0.1 | [tinyproxy-bin 1.10.0-4ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-tinyproxy-bin-1.10.0-4ubuntu0.1.md) | Sep 19, 2022 |
| Linux | tinyproxy-bin Ubuntu 22.04.1 LTS (jammy) | 1.11.0-1ubuntu0.1~esm1 | [tinyproxy-bin 1.11.0-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-tinyproxy-bin-1.11.0-1ubuntu0.1-esm1.md) | Sep 19, 2022 |

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Data as of 2026-11-07T06:34:28Z 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