Vulnerability · Published Mar 18, 2021 · Assigned by redhat
CVE-2020-27827
High 7.5
In plain English
A high-severity uncontrolled resource consumption in lldp/openvswitch. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.2% (higher than 88% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)3.2%top 11.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:9 | lldpd | 1.0.18-4.el9 | ALSA-2024:9158 |
| AlmaLinux:9 | lldpd-devel | 1.0.18-4.el9 | ALSA-2024:9158 |
| Alpine:v3.20 | lldpd | 1.0.8-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.21 | lldpd | 1.0.8-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.22 | lldpd | 1.0.8-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.23 | lldpd | 1.0.8-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.24 | lldpd | 1.0.8-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.20 | openvswitch | 2.12.2-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.21 | openvswitch | 2.12.2-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.22 | openvswitch | 2.12.2-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.23 | openvswitch | 2.12.2-r0 | ALPINE-CVE-2020-27827 |
| Alpine:v3.24 | openvswitch | 2.12.2-r0 | ALPINE-CVE-2020-27827 |
| Debian:12 | lldpd | 1.0.8-1 | DEBIAN-CVE-2020-27827 |
| Debian:13 | lldpd | 1.0.8-1 | DEBIAN-CVE-2020-27827 |
| Debian:14 | lldpd | 1.0.8-1 | DEBIAN-CVE-2020-27827 |
| Debian:12 | openvswitch | 2.15.0~git20210104.def6eb1ea+dfsg1-4 | DEBIAN-CVE-2020-27827 |
| Debian:13 | openvswitch | 2.15.0~git20210104.def6eb1ea+dfsg1-4 | DEBIAN-CVE-2020-27827 |
| Debian:14 | openvswitch | 2.15.0~git20210104.def6eb1ea+dfsg1-4 | DEBIAN-CVE-2020-27827 |
| Rocky Linux:9 | lldpd | 0:1.0.18-4.el9 | RLSA-2024:9158 |
| Ubuntu:22.04:LTS | lldpd | no fix listed | UBUNTU-CVE-2020-27827 |
| Ubuntu:24.04:LTS | lldpd | no fix listed | UBUNTU-CVE-2020-27827 |
| Ubuntu:25.10 | lldpd | no fix listed | UBUNTU-CVE-2020-27827 |
| Ubuntu:26.04:LTS | lldpd | no fix listed | UBUNTU-CVE-2020-27827 |
| Ubuntu:26.10 | lldpd | no fix listed | UBUNTU-CVE-2020-27827 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | lldp/openvswitch | lldpd 1.0.8, openvswitch 2.14.1, openvswitch 2.13.2, openvswitch 2.12.2, openvswitch 2.11.5, openvswitch 2.10.6, openvswitch 2.9.8, openvswitch 2.8.10, openvswitch 2.7.12, openvswitch 2.6.9 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1921438
- https://mail.openvswitch.org/pipermail/ovs-dev/2021-January/379471.html
- https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-194-07
- FEDORA-2023-88991d2713 vendor-advisory
- FEDORA-2023-c0c184a019 vendor-advisory
- FEDORA-2023-3e4feeadec vendor-advisory
- GLSA-202311-16 vendor-advisory