CVE-2020-1983 libslirp: use after free vulnerability cause a denial of service.
Crafted packets trigger a use-after-free in libslirp, causing a denial of service for applications using this network library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-1983?
CVE-2020-1983 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 22 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-416
Which versions are affected by CVE-2020-1983?
It affects 5 products.
Linux distribution packages (8)
qemu SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 3.1.1.1-9.21.4 |
slirp4netns SUSE:Linux Enterprise Module for Containers 15 SP1 | All versions | 0.4.5-3.9.1 |
qemu SUSE:Linux Enterprise Module for Server Applications 15 SP1 | All versions | 3.1.1.1-9.21.4 |
qemu SUSE:Linux Enterprise Server 12 SP5 | All versions | 3.1.1.1-3.14.1 |
qemu SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 3.1.1.1-3.14.1 |
qemu openSUSE:Leap 15.1 | All versions | 3.1.1.1-lp151.7.15.2 |
qemu-linux-user openSUSE:Leap 15.1 | All versions | 3.1.1.1-lp151.7.15.2 |
slirp4netns openSUSE:Leap 15.1 | All versions | 0.4.5-lp151.2.9.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Libslirp Project Libslirp, Opensuse Leap.
How do I fix CVE-2020-1983?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-1983 being exploited?
There is no known exploitation of CVE-2020-1983 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as DEBIAN-CVE-2020-1983, GHSA-m3gw-pxj4-v7p8, SUSE-SU-2020:1197-1, SUSE-SU-2020:1502-1, SUSE-SU-2020:1516-1, UBUNTU-CVE-2020-1983 and 2 more.