Use After Free in Libslirp Project
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.024 (83.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.023 · newest: 0.024 · change: +0.000
Affected products
- Libslirp Project
- Slirp Libslirp — versions unspecified
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
- Debian Linux — versions 8.0, 9.0
- Fedoraproject Fedora — versions 31, 32
- openSUSE Leap — versions 15.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.freedesktop.org/slirp/libslirp/-/issues/20 (Exploit, Third Party Advisory)
- gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c2512966… (Patch, Third Party Advisory)
- www.debian.org/security/2020/dsa-4665 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4372-1/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/06/msg00032.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/07/msg00020.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-1983?
- CVE-2020-1983 is a high-severity vulnerability in Libslirp Project, classified under Use After Free. CVSS score: 7.5/10. Published 2020-04-22.
- How severe is CVE-2020-1983?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2020-1983 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.