# CVE-2022-30636: golang-go.crypto: httpTokenCacheKey uses path.Base to extract the expected HTTP-01 token value to lookup in the DirCache implementation

CVE-2022-30636 is fixed in golang-go.crypto on 1 platform, first by DEBIAN-CVE-2022-30636, released July 2, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-30636
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0064
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 2, 2024

## Description

httpTokenCacheKey uses path.Base to extract the expected HTTP-01 token value to lookup in the DirCache implementation. On Windows, path.Base acts differently to filepath.Base, since Windows uses a different path separator (\ vs. /), allowing a user to provide a relative path, i.e. .well-known/acme-challenge/..\..\asd becomes ..\..\asd. The extracted path is then suffixed with +http-01, joined with the cache directory, and opened. Since the controlled path is suffixed with +http-01 before opening, the impact of this is significantly limited, since it only allows reading arbitrary files on the system if and only if they have this suffix.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | golang-go.crypto Debian 12.15 (bookworm) | 1:0.0~git20220829.c86fa9a-1 | [DEBIAN-CVE-2022-30636](https://patchblox.com/security/data/fix/linux/debian-cve-2022-30636.md) | Jul 2, 2024 |
| Linux | golang-go.crypto Debian 13.5 (trixie) | 1:0.0~git20220829.c86fa9a-1 | [DEBIAN-CVE-2022-30636](https://patchblox.com/security/data/fix/linux/debian-cve-2022-30636.md) | Jul 2, 2024 |
| Linux | golang-go.crypto Debian 14 | 1:0.0~git20220829.c86fa9a-1 | [DEBIAN-CVE-2022-30636](https://patchblox.com/security/data/fix/linux/debian-cve-2022-30636.md) | Jul 2, 2024 |

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