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.
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
https://gitlab.freedesktop.org/slirp/libslirp/-/tags/v4.1.0
https://gitlab.freedesktop.org/slirp/libslirp/commit/68ccb8021a838066f0951d4b2817eb6b6f10a843
https://lists.debian.org/debian-lts-announce/2020/03/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/03/msg00017.html
https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html
https://lists.debian.org/debian-lts-announce/2021/02/msg00012.html
https://security.gentoo.org/glsa/202003-66
https://security.netapp.com/advisory/ntap-20201001-0002/
https://usn.ubuntu.com/4283-1/
Source: MITRE
Published: 2020-02-06
Updated: 2021-02-14
Type: CWE-120
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 5.6
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Impact Score: 3.4
Exploitability Score: 2.2
Severity: MEDIUM