CVE-2020-1983: libslirp: use after free vulnerability cause a denial of service.
First published: Thu Apr 02 2020(Updated: )
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.
Credit: psirt@paloaltonetworks.com psirt@paloaltonetworks.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/qemu-kvm | <10:1.5.3-175.el7_9.1 | 10:1.5.3-175.el7_9.1 |
| redhat/qemu-kvm-ma | <10:2.12.0-48.el7_9.2 | 10:2.12.0-48.el7_9.2 |
| redhat/qemu-kvm-rhev | <10:2.12.0-48.el7_9.2 | 10:2.12.0-48.el7_9.2 |
| 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 | |
| redhat/libslirp | <4.3.0 | 4.3.0 |
| debian/libslirp | 4.4.0-1+deb11u2 4.7.0-1 4.8.0-1 | |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u7 1:9.2.0+ds-2 1:9.2.0+ds-3 | |
| debian/slirp4netns | 1.0.1-2 1.2.0-1 1.2.1-1 |
Remedy
https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-1983 https://nvd.nist.gov/vuln/detail/CVE-2020-1983
- https://bugzilla.redhat.com/show_bug.cgi?id=1829825
- https://access.redhat.com/errata/RHSA-2020:4290
- https://access.redhat.com/errata/RHBA-2020:3172
- https://access.redhat.com/errata/RHSA-2020:4079
- https://access.redhat.com/errata/RHSA-2021:0346
- https://access.redhat.com/errata/RHSA-2020:3053
- https://access.redhat.com/errata/RHSA-2020:4676
- https://access.redhat.com/errata/RHSA-2021:0934
- https://access.redhat.com/errata/RHSA-2021:0459
- https://access.redhat.com/security/cve/cve-2020-1983
- http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00022.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00001.html
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04
- https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20
- https://lists.debian.org/debian-lts-announce/2020/06/msg00032.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00020.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/
- https://usn.ubuntu.com/4372-1/
- https://www.debian.org/security/2020/dsa-4665
- https://launchpad.net/bugs/cve/CVE-2020-1983
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HWFD4MWV3YWIHVHSA2F7FKOLJFL4PHOX/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKT2MTSINE4NUPG5L6BYH6N23NBNITOL/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1829827
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1829826
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1835839
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9bd6c5913271eabcb7768a58197ed3301fe19f2d
- https://github.com/rootless-containers/slirp4netns/security/advisories/GHSA-p3hx-89v2-4r99
- https://security-tracker.debian.org/tracker/CVE-2020-1983
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-1983
- https://nvd.nist.gov/vuln/detail/CVE-2020-1983
- https://ubuntu.com/security/CVE-2020-1983
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-1983?
CVE-2020-1983 is a use after free vulnerability in ip_reass() in ip_input.c of libslirp 4.2.0 and prior releases.
What is the severity of CVE-2020-1983?
The severity of CVE-2020-1983 is high, with a CVSS score of 6.5.
How does CVE-2020-1983 affect the QEMU emulator?
CVE-2020-1983 can cause the QEMU process on the host to crash.
How can I fix CVE-2020-1983?
To fix CVE-2020-1983, update to libslirp version 4.3.0 or later.
Where can I find more information about CVE-2020-1983?
You can find more information about CVE-2020-1983 at the following references: [link1], [link2], [link3].
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