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CVE-2020-27827

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Date: March 17, 2021

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.

Language: C

Severity Score

Related Resources (21)

https://nvd.nist.gov/vuln/detail/CVE-2020-27827
https://access.redhat.com/security/cve/CVE-2020-27827
https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html
https://bugzilla.redhat.com/show_bug.cgi?id=1921438
https://security.alpinelinux.org/vuln/CVE-2020-27827
https://security.gentoo.org/glsa/202311-16
https://security.archlinux.org/CVE-2020-27827
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
https://github.com/openvswitch/ovs/pull/337
https://github.com/lldpd/lldpd/commit/a8d3c90feca548fc0656d95b5d278713db86ff61
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-27827
https://security-tracker.debian.org/tracker/CVE-2020-27827
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
https://mail.openvswitch.org/pipermail/ovs-announce/2021-January/000269.html
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
https://www.mend.io/vulnerability-database/CVE-2020-27827

Severity Score

Weakness Type (CWE)

Uncontrolled Resource Consumption ('Resource Exhaustion')

CWE-400

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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