high
7.5
CWE
400
Advisory Published
CVE Published
Updated

CVE-2020-27827

First published: Wed Jan 13 2021(Updated: )

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.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/openvswitch2.11<0:2.11.3-86.el7fd
0:2.11.3-86.el7fd
redhat/openvswitch2.13<0:2.13.0-81.el7fd
0:2.13.0-81.el7fd
redhat/openvswitch<0:2.9.9-1.el7fd
0:2.9.9-1.el7fd
redhat/openvswitch2.13<0:2.13.0-79.5.el8fd
0:2.13.0-79.5.el8fd
redhat/openvswitch2.11<0:2.11.3-83.el8fd
0:2.11.3-83.el8fd
redhat/ovn2.11<0:2.11.1-57.el7fd
0:2.11.1-57.el7fd
redhat/redhat-virtualization-host<0:4.3.14-20210322.0.el7_9
0:4.3.14-20210322.0.el7_9
redhat/redhat-virtualization-host<0:4.4.4-20210307.0.el8_3
0:4.4.4-20210307.0.el8_3
debian/openvswitch<=2.10.0+2018.08.28+git.8ca7c82b7d+ds1-12<=2.15.0~git20210104.def6eb1ea+dfsg1-3<=2.10.0+2018.08.28+git.8ca7c82b7d+ds1-12+deb10u2
debian/lldpd<=1.0.3-1
1.0.3-1+deb10u2
1.0.11-1+deb11u2
1.0.16-1+deb12u1
1.0.17-1
debian/openvswitch
2.10.7+ds1-0+deb10u1
2.10.7+ds1-0+deb10u4
2.15.0+ds1-2+deb11u4
3.1.0-2
3.2.0-2
redhat/lldpd<1.0.8
1.0.8
redhat/openvswitch<2.14.1
2.14.1
redhat/openvswitch<2.13.2
2.13.2
redhat/openvswitch<2.12.2
2.12.2
redhat/openvswitch<2.11.5
2.11.5
redhat/openvswitch<2.10.6
2.10.6
redhat/openvswitch<2.9.8
2.9.8
redhat/openvswitch<2.8.10
2.8.10
redhat/openvswitch<2.7.12
2.7.12
redhat/openvswitch<2.6.9
2.6.9
Siemens SIMATIC HMI Unified Comfort Panels<17
17
Siemens SIMATIC NET CP 1542SP-1
Siemens SIMATIC NET CP 1542SP-1 IRC (incl. SIPLUS variants) (6GK7243-8RX30-0XE0)
Siemens SIMATIC NET CP 1543-1
Siemens SIMATIC NET CP 1543SP-1 (incl. SIPLUS variants)
Siemens SIMATIC NET CP 1545-1<1.1
1.1
lldpd<1.0.8
Open vSwitch>=2.6.0<2.6.9
Open vSwitch>=2.7.0<2.7.12
Open vSwitch>=2.8.0<2.8.10
Open vSwitch>=2.9.0<2.9.8
Open vSwitch>=2.10.0<2.10.6
Open vSwitch>=2.11.0<2.11.5
Open vSwitch>=2.12.0<2.12.2
Open vSwitch>=2.13.0<2.13.2
Open vSwitch>=2.14.0<2.14.1
redhat openshift container platform=4.0
redhat openstack=10
redhat openstack=13
Red Hat Enterprise Virtualization=4.0
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
Fedora=33
All of
Siemens SIMATIC HMI Unified Comfort Panels
Siemens SIMATIC HMI Unified Comfort Panels<17
All of
Siemens Simatic Net CP 1243-1 Firmware
Siemens Simatic Net CP 1243-1 Firmware
All of
Siemens Simatic Net CP 1243-8 IRC Firmware
Siemens SIMATIC CP 1243-8 IRC Firmware
All of
Siemens SIMATIC NET CP 1542SP-1
Siemens Simatic Net CP 1542SP-1 IRC Firmware
All of
Siemens Simatic Net CP 1542SP-1
Siemens Simatic Net CP 1542SP-1 IRC Firmware
All of
Siemens SIMATIC NET CP 1543-1
siemens simatic net cp 1543-1 firmware
All of
Siemens SIMATIC NET CP 1543SP-1 (incl. SIPLUS variants)
Siemens Simatic Net CP 1543SP-1
All of
siemens simatic net cp 1545-1 firmware
Siemens SIMATIC NET CP 1545-1
All of
siemens tim 1531 irc firmware<2.2
siemens tim 1531 irc
All of
siemens sinumerik one firmware<2.0.1
siemens sinumerik one
Siemens SIMATIC HMI Unified Comfort Panels<17
Siemens SIMATIC HMI Unified Comfort Panels
Siemens Simatic Net CP 1243-1 Firmware
Siemens Simatic Net CP 1243-1 Firmware
Siemens SIMATIC CP 1243-8 IRC Firmware
Siemens Simatic Net CP 1243-8 IRC Firmware
Siemens Simatic Net CP 1542SP-1 IRC Firmware
Siemens SIMATIC NET CP 1542SP-1
Siemens Simatic Net CP 1542SP-1 IRC Firmware
Siemens Simatic Net CP 1542SP-1
siemens simatic net cp 1543-1 firmware
Siemens SIMATIC NET CP 1543-1
Siemens Simatic Net CP 1543SP-1
Siemens SIMATIC NET CP 1543SP-1 (incl. SIPLUS variants)
siemens simatic net cp 1545-1 firmware
Siemens SIMATIC NET CP 1545-1
siemens tim 1531 irc firmware<2.2
siemens tim 1531 irc
siemens sinumerik one firmware<2.0.1
siemens sinumerik one

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=1921438

Remedy

https://cert-portal.siemens.com/productcert/pdf/ssa-941426.pdf

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-27827?

    CVE-2020-27827 has a high severity rating due to its potential to cause denial of service through memory loss.

  • How do I fix CVE-2020-27827?

    To mitigate CVE-2020-27827, upgrade to the fixed versions of OpenvSwitch as specified in the remediation guidance.

  • Which versions of OpenvSwitch are affected by CVE-2020-27827?

    CVE-2020-27827 affects multiple versions of OpenvSwitch, specifically those prior to the specified fixed releases.

  • What systems are at risk from CVE-2020-27827?

    Systems running vulnerable versions of OpenvSwitch are at risk of denial of service due to this vulnerability.

  • Is CVE-2020-27827 exploitable over the network?

    Yes, CVE-2020-27827 can be exploited through specially crafted LLDP packets sent over the network.

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