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Vulnerability · Published Feb 11, 2021 · Assigned by redhat

CVE-2020-35498

High 7.5

In plain English

A high-severity uncontrolled resource consumption in openvswitch. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 8.0% (higher than 95% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)8.0%top 5.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack tooling1Public PoC

Official description

A vulnerability was found in openvswitch. A limitation in the implementation of userspace packet parsing can allow a malicious user to send a specially crafted packet causing the resulting megaflow in the kernel to be too wide, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.20openvswitch2.12.3-r0ALPINE-CVE-2020-35498
Alpine:v3.21openvswitch2.12.3-r0ALPINE-CVE-2020-35498
Alpine:v3.22openvswitch2.12.3-r0ALPINE-CVE-2020-35498
Alpine:v3.23openvswitch2.12.3-r0ALPINE-CVE-2020-35498
Alpine:v3.24openvswitch2.12.3-r0ALPINE-CVE-2020-35498
Debian:12openvswitch2.15.0~git20210104.def6eb1ea+dfsg1-5DEBIAN-CVE-2020-35498
Debian:13openvswitch2.15.0~git20210104.def6eb1ea+dfsg1-5DEBIAN-CVE-2020-35498
Debian:14openvswitch2.15.0~git20210104.def6eb1ea+dfsg1-5DEBIAN-CVE-2020-35498

Affected products (as reported)

VendorProductVersions
n/a openvswitch openvswitch 2.5.12, openvswitch 2.6.10, openvswitch 2.7.13, openvswitch 2.8.11, openvswitch 2.9.9, openvswitch 2.10.7, openvswitch 2.11.6, openvswitch 2.12.3, openvswitch 2.13.3, openvswitch 2.14.2

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References