CVE-2020-27827

7.5 HIGH
Published: March 18, 2021 Modified: December 03, 2025
View on NVD

Description

A flaw was found in multiple versions of OpenvSwitch. Specially crafted LLDP packets can cause memory to be lost when allocating data to handle specific optional TLVs, potentially causing a denial of service. The highest threat from this vulnerability is to system availability.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1921438
Source: secalert@redhat.com
Issue Tracking Mitigation Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
Source: secalert@redhat.com
Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
Source: secalert@redhat.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
Source: secalert@redhat.com
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
Source: secalert@redhat.com
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html
Source: secalert@redhat.com
Mailing List Mitigation Vendor Advisory
https://security.gentoo.org/glsa/202311-16
Source: secalert@redhat.com
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
Source: secalert@redhat.com
Third Party Advisory US Government Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1921438
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Mitigation Patch Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
Source: af854a3a-2127-422b-91ae-364da2661108
Patch Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
Source: af854a3a-2127-422b-91ae-364da2661108
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Mitigation Vendor Advisory
https://security.gentoo.org/glsa/202311-16
Source: af854a3a-2127-422b-91ae-364da2661108
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory US Government Resource

16 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.4%
61th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-400

Affected Vendors

lldpd_project fedoraproject openvswitch siemens redhat

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