CVE-2020-1983: libslirp project libslirp – CVSS 6.5 · Watchpost

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CVE-2020-1983

MEDIUM 6.5CVE-2020-1983 · Published 22/04/2020 · updated 17/06/2026

In short

CVE-2020-1983 is a MEDIUM (CVSS 6.5) vulnerability affecting libslirp (libslirp project).
Chance of exploitation in the next 30 days (EPSS): 2.4%, higher than 83.8% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
libslirp libslirp_project	`≤ 4.2.0`	No fix yet

Description

A use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases allows crafted packets to cause a denial of service.

References

lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html · Mailing List
lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html · Mailing List
gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04 · Patch
gitlab.freedesktop.org/slirp/libslirp/-/issues/20 · Exploit
lists.debian.org/debian-lts-announce/2020/06/msg00032.html · Mailing List
lists.debian.org/debian-lts-announce/2020/07/msg00020.html · Mailing List
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL
usn.ubuntu.com/4372-1 · Third Party Advisory
debian.org/security/2020/dsa-4665

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