CVE-2020-1983
MEDIUMCVSS 6.5/10EPSS 2.29%
Last modified
CVE-2020-1983 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 2.29% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Libslirp Project | Libslirp | <= 4.2.0 |
| Fedoraproject | Fedora | 31 |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Opensuse | Leap | 15.1 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Canonical | Ubuntu Linux | 19.10 |
| Canonical | Ubuntu Linux | 20.04 |
References
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.htmlMailing List, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04Patch, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/06/msg00032.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4372-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4665Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.htmlMailing List, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04Patch, Third Party Advisory
- https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20Exploit, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/06/msg00032.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/4372-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4665Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-1983?
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.
How severe is CVE-2020-1983?
CVE-2020-1983 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.29% probability of exploitation in the next 30 days.
How do I fix CVE-2020-1983?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2020-1983?
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Scan your code nowSource: NVD / NIST