CVE-2020-29130
First published: Thu Nov 26 2020(Updated: )
An out-of-bounds access issue was found in the SLiRP user networking implementation of QEMU. It could occur while processing ARP/NCSI packets, if the packet length was shorter than required to accommodate respective protocol headers and payload. A privileged guest user may use this flaw to potentially leak host information bytes.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libslirp Project Libslirp | <=4.3.1 | |
| Debian Debian Linux | =9.0 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| 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 |
Remedy
https://gitlab.freedesktop.org/slirp/libslirp/-/commit/2e1dcbc0c2af64fcb17009eaf2ceedd81be2b27f
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-29130 https://nvd.nist.gov/vuln/detail/CVE-2020-29130 https://www.openwall.com/lists/oss-security/2020/11/27/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1902231
- https://access.redhat.com/errata/RHSA-2021:1762
- https://access.redhat.com/security/cve/cve-2020-29130
- https://lists.freedesktop.org/archives/slirp/2020-November/000115.html
- http://www.openwall.com/lists/oss-security/2020/11/27/1
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/45S5IHSWYITJKMRT23HCHJQDI674AMTQ/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OPCOHDEONMHH6QPJZKRLLCNRGRYODG7X/
- https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html
- https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html
- https://launchpad.net/bugs/cve/CVE-2020-29130
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/45S5IHSWYITJKMRT23HCHJQDI674AMTQ/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPCOHDEONMHH6QPJZKRLLCNRGRYODG7X/
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/2e1dcbc0c2af64fcb17009eaf2ceedd81be2b27f
- https://github.com/rootless-containers/slirp4netns/security/advisories/GHSA-2j37-w439-87q3
- https://security-tracker.debian.org/tracker/CVE-2020-29130
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-29130
- https://nvd.nist.gov/vuln/detail/CVE-2020-29130
- https://ubuntu.com/security/CVE-2020-29130
Frequently Asked Questions
What is CVE-2020-29130?
CVE-2020-29130 is an out-of-bounds access issue in the SLiRP user networking implementation of QEMU.
What software is affected by CVE-2020-29130?
The affected software includes libslirp versions up to and including 4.3.1, Debian Linux 9.0, Fedora 32 and 33.
How can a privileged guest user exploit CVE-2020-29130?
A privileged guest user can exploit CVE-2020-29130 by triggering an out-of-bounds access issue during the processing of ARP/NCSI packets.
How severe is CVE-2020-29130?
CVE-2020-29130 has a severity rating of 4.3, which is considered medium.
How can I fix CVE-2020-29130?
To fix CVE-2020-29130, it is recommended to update to a patched version of libslirp or upgrade the affected software packages.
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