CVE-2021-20203
Last modified
CVE-2021-20203 is a low-severity vulnerability rated 3.2/10 on the CVSS scale. An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. EPSS estimates a 0.59% chance of exploitation in the next 30 days.
Description
An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Qemu | Qemu | <= 5.2.0 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 9.0 |
| Debian | Debian Linux | 10.0 |
References
- https://bugs.launchpad.net/qemu/+bug/1913873Exploit, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1922441Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
- https://bugs.launchpad.net/qemu/+bug/1913873Exploit, Patch, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1922441Issue Tracking, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/04/msg00009.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlMailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202208-27Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-20203?
How severe is CVE-2021-20203?
How do I fix CVE-2021-20203?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-20198A flaw was found in the OpenShift Installer before version v…8.1
- CVE-2021-20199Rootless containers run with Podman, receive all traffic wit…5.9
- CVE-2021-2020Vulnerability in the MySQL Server product of Oracle MySQL (c…6.5
- CVE-2021-20200Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-20201A flaw was found in spice in versions before 0.14.92. A DoS …5.3
- CVE-2021-20202A flaw was found in keycloak. Directories can be created pri…7.3
- CVE-2021-20204A heap memory corruption problem (use after free) can be tri…9.8
- CVE-2021-20205Libjpeg-turbo versions 2.0.91 and 2.0.90 is vulnerable to a …6.5
- CVE-2021-20206An improper limitation of path name flaw was found in contai…7.2
- CVE-2021-20207Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
- CVE-2021-20208A flaw was found in cifs-utils in versions before 6.13. A us…6.1
- CVE-2021-20209A memory leak vulnerability was found in Privoxy before 3.0.…7.5
Are you affected by CVE-2021-20203?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST