7.5
HIGH
CVE-2020-27827
OpenvSwitch LLDP Denial of Service Vulnerability
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.

INFO

Published Date :

March 18, 2021, 5:15 p.m.

Last Modified :

Nov. 26, 2023, 11:15 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2020-27827 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Siemens simatic_net_cp_1243-1_firmware
2 Siemens simatic_net_cp_1243-8_irc_firmware
3 Siemens simatic_net_cp_1542sp-1_firmware
4 Siemens simatic_net_cp_1542sp-1_irc_firmware
5 Siemens simatic_net_cp_1543-1_firmware
6 Siemens simatic_net_cp_1543sp-1_firmware
7 Siemens tim_1531_irc_firmware
8 Siemens simatic_net_cp_1545-1_firmware
9 Siemens simatic_hmi_unified_comfort_panels_firmware
10 Siemens sinumerik_one_firmware
1 Redhat enterprise_linux
2 Redhat openstack
3 Redhat openshift_container_platform
4 Redhat virtualization
1 Fedoraproject fedora
1 Lldpd_project lldpd
1 Openvswitch openvswitch

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-27827 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-27827 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 26, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://security.gentoo.org/glsa/202311-16 [No types assigned]
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/ [No types assigned]
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/ [No types assigned]
    Added Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/ [No types assigned]
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/
    Removed Reference Red Hat, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/
  • CVE Modified by [email protected]

    Apr. 20, 2023

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/SKQWHG2SZJZSGC7PXVDAEJYBN7ESDR7D/ [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 20, 2023

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/3T5XHPOGIPWCRRPJUE6P3HVC5PTSD5JS/ [No Types Assigned]
  • CVE Modified by [email protected]

    Apr. 19, 2023

    Action Type Old Value New Value
    Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/JYA4AMJXCNF6UPFG36L2TPPT32C242SP/ [No Types Assigned]
  • Modified Analysis by [email protected]

    Oct. 07, 2022

    Action Type Old Value New Value
    Changed Reference Type https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf No Types Assigned https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf Patch, Third Party Advisory
    Changed Reference Type https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 No Types Assigned https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 Third Party Advisory, US Government Resource
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_hmi_unified_comfort_panels_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 17 OR cpe:2.3:h:siemens:simatic_hmi_unified_comfort_panels:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1243-1_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1243-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1243-8_irc_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1243-8_irc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1542sp-1_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1542sp-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1542sp-1_irc_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1542sp-1_irc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1543-1_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1543-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1543sp-1_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1543sp-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:simatic_net_cp_1545-1_firmware:-:*:*:*:*:*:*:* OR cpe:2.3:h:siemens:simatic_net_cp_1545-1:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:tim_1531_irc_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.2 OR cpe:2.3:h:siemens:tim_1531_irc:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:siemens:sinumerik_one_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 2.0.1 OR cpe:2.3:h:siemens:sinumerik_one:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Aug. 04, 2021

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:redhat:openstack:13.0:*:*:*:*:*:*:* OR *cpe:2.3:a:redhat:openstack:13:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Aug. 02, 2021

    Action Type Old Value New Value
    Added Reference https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07 [No Types Assigned]
  • CVE Modified by [email protected]

    Jul. 13, 2021

    Action Type Old Value New Value
    Added Reference https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf [No Types Assigned]
  • Initial Analysis by [email protected]

    Mar. 29, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:C)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=1921438 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=1921438 Issue Tracking, Mitigation, Patch, Third Party Advisory
    Changed Reference Type https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html No Types Assigned https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html Mailing List, Mitigation, Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:a:lldpd_project:lldpd:*:*:*:*:*:*:*:* versions up to (excluding) 1.0.8 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.6.0 up to (excluding) 2.6.9 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.7.0 up to (excluding) 2.7.12 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.8.0 up to (excluding) 2.8.10 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.9.0 up to (excluding) 2.9.8 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.10.0 up to (excluding) 2.10.6 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.11.0 up to (excluding) 2.11.5 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.12.0 up to (excluding) 2.12.2 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.13.0 up to (excluding) 2.13.2 *cpe:2.3:a:openvswitch:openvswitch:*:*:*:*:*:*:*:* versions from (including) 2.14.0 up to (excluding) 2.14.1
    Added CPE Configuration OR *cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:10:*:*:*:*:*:*:* *cpe:2.3:a:redhat:openstack:13.0:*:*:*:*:*:*:* *cpe:2.3:a:redhat:virtualization:4.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* *cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-27827 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-27827 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.62 }} 0.04%

score

0.79271

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability