CVE-2020-27617
First published: Tue Oct 20 2020(Updated: )
An assert(3) failure flaw was found in the networking helper functions of QEMU. This vulnerability can occur in the eth_get_gso_type() routine if a packet does not have a valid networking L3 protocol (ex. IPv4, IPv6) value. This flaw allows a guest user to crash the QEMU process on the host, resulting in a denial of service.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/QEMU | <5.2.0 | 5.2.0 |
| debian/qemu | 1:5.2+dfsg-11+deb11u3 1:5.2+dfsg-11+deb11u2 1:7.2+dfsg-7+deb12u7 1:9.0.2+ds-2 1:9.1.0+ds-3 | |
| QEMU KVM | =4.2.1 | |
| Debian GNU/Linux | =9.0 | |
| Debian GNU/Linux | =10.0 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-27617 https://nvd.nist.gov/vuln/detail/CVE-2020-27617 https://bugs.launchpad.net/qemu/+bug/1878067 https://www.openwall.com/lists/oss-security/2020/11/02/1
- https://bugzilla.redhat.com/show_bug.cgi?id=1891668
- https://access.redhat.com/errata/RHBA-2021:0639
- https://access.redhat.com/errata/RHSA-2021:3061
- https://access.redhat.com/security/cve/cve-2020-27617
- http://www.openwall.com/lists/oss-security/2020/11/02/1
- https://lists.debian.org/debian-lts-announce/2020/11/msg00047.html
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html
- https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg05731.html
- https://security.netapp.com/advisory/ntap-20201202-0002/
- https://launchpad.net/bugs/cve/CVE-2020-27617
- https://lists.nongnu.org/archive/html/qemu-devel/2020-10/msg06023.html
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1891669
- https://bugs.launchpad.net/qemu/+bug/1878067
- https://www.openwall.com/lists/oss-security/2020/11/02/1
- https://git.qemu.org/?p=qemu.git;a=commit;h=7564bf7701f00214cdc8a678a9f7df765244def1
- https://security-tracker.debian.org/tracker/CVE-2020-27617
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27617
- https://nvd.nist.gov/vuln/detail/CVE-2020-27617
- https://ubuntu.com/security/CVE-2020-27617
Frequently Asked Questions
What is the severity of CVE-2020-27617?
CVE-2020-27617 has a medium severity rating which indicates it could effectively lead to a denial of service.
How do I fix CVE-2020-27617?
To fix CVE-2020-27617, update QEMU to version 5.2.0 or higher if you are using Red Hat, or to specific patched versions if you are using Debian.
What systems are affected by CVE-2020-27617?
CVE-2020-27617 affects various versions of QEMU and Debian Linux, specifically the versions mentioned in the vulnerability details.
What kind of attack is possible with CVE-2020-27617?
An attacker can exploit CVE-2020-27617 by sending invalid network packets, potentially crashing the QEMU process on the host.
Is CVE-2020-27617 exploitable remotely?
Yes, CVE-2020-27617 can be exploited remotely if an attacker has access to the networking services of a vulnerable QEMU instance.
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