high
7.8
CWE
362 416
Advisory Published
CVE Published
CVE Published
Updated

CVE-2021-3609: Race Condition

First published: Mon Jun 14 2021(Updated: )

.A flaw was found in the CAN BCM networking protocol in the Linux kernel, where a local attacker can abuse a flaw in the CAN subsystem to corrupt memory, crash the system or escalate privileges. This race condition in net/can/bcm.c in the Linux kernel allows for local privilege escalation to root.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-305.12.1.rt7.84.el8_4
0:4.18.0-305.12.1.rt7.84.el8_4
redhat/kernel<0:4.18.0-305.12.1.el8_4
0:4.18.0-305.12.1.el8_4
redhat/kernel<0:4.18.0-147.54.2.el8_1
0:4.18.0-147.54.2.el8_1
redhat/kernel-rt<0:4.18.0-193.64.1.rt13.115.el8_2
0:4.18.0-193.64.1.rt13.115.el8_2
redhat/kernel<0:4.18.0-193.64.1.el8_2
0:4.18.0-193.64.1.el8_2
redhat/redhat-virtualization-host<0:4.4.7-20210804.0.el8_4
0:4.4.7-20210804.0.el8_4
Linux Linux kernel>=2.6.25<4.4.276
Linux Linux kernel>=4.5<4.9.276
Linux Linux kernel>=4.10<4.14.240
Linux Linux kernel>=4.15<4.19.198
Linux Linux kernel>=4.20<5.4.132
Linux Linux kernel>=5.5.0<5.10.50
Linux Linux kernel>=5.11<5.12.17
Linux Linux kernel>=5.13<5.13.2
Redhat 3scale Api Management=2.0
Redhat Build Of Quarkus=1.0
Redhat Codeready Linux Builder Eus=8.1
Redhat Codeready Linux Builder Eus=8.2
Redhat Codeready Linux Builder Eus=8.4
Redhat Codeready Linux Builder For Power Little Endian Eus=8.1
Redhat Codeready Linux Builder For Power Little Endian Eus=8.2
Redhat Codeready Linux Builder For Power Little Endian Eus=8.4
Redhat Openshift Container Platform=4.6
Redhat Openshift Container Platform=4.7
Redhat Openshift Container Platform=4.8
Redhat Virtualization=4.0
Redhat Virtualization Host=4.0
Redhat Enterprise Linux Aus=8.2
Redhat Enterprise Linux Eus=8.1
Redhat Enterprise Linux Eus=8.2
Redhat Enterprise Linux Eus=8.4
Redhat Enterprise Linux For Ibm Z Systems Eus=8.4
Redhat Enterprise Linux For Ibm Z Systems Eus S390x=8.1
Redhat Enterprise Linux For Power Little Endian Eus=8.1
Redhat Enterprise Linux For Power Little Endian Eus=8.2
Redhat Enterprise Linux For Power Little Endian Eus=8.4
Redhat Enterprise Linux For Real Time=8.0
Redhat Enterprise Linux For Real Time For Nfv=8.0
Redhat Enterprise Linux For Real Time For Nfv Tus=8.0
Redhat Enterprise Linux For Real Time For Nfv Tus=8.2
Redhat Enterprise Linux For Real Time Tus=8.0
Redhat Enterprise Linux For Real Time Tus=8.2
Redhat Enterprise Linux Server Aus=8.2
Redhat Enterprise Linux Server Aus=8.4
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.1
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.2
Redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.4
Redhat Enterprise Linux Server Tus=8.2
Redhat Enterprise Linux Server Tus=8.4
Redhat Enterprise Linux Server Update Services For Sap Solutions=8.1
Redhat Enterprise Linux Server Update Services For Sap Solutions=8.2
Redhat Enterprise Linux Server Update Services For Sap Solutions=8.4
Netapp H300s Firmware
Netapp H300s
Netapp H500s Firmware
Netapp H500s
Netapp H700s Firmware
Netapp H700s
Netapp H300e Firmware
Netapp H300e
Netapp H500e Firmware
Netapp H500e
Netapp H700e Firmware
Netapp H700e
Netapp H410s Firmware
Netapp H410s
Netapp H410c Firmware
Netapp H410c
Netapp H610c Firmware
Netapp H610c
Netapp H610s Firmware
Netapp H610s
Netapp H615c Firmware
Netapp H615c
All of
Netapp H300s Firmware
Netapp H300s
All of
Netapp H500s Firmware
Netapp H500s
All of
Netapp H700s Firmware
Netapp H700s
All of
Netapp H300e Firmware
Netapp H300e
All of
Netapp H500e Firmware
Netapp H500e
All of
Netapp H700e Firmware
Netapp H700e
All of
Netapp H410s Firmware
Netapp H410s
All of
Netapp H410c Firmware
Netapp H410c
All of
Netapp H610c Firmware
Netapp H610c
All of
Netapp H610s Firmware
Netapp H610s
All of
Netapp H615c Firmware
Netapp H615c
IBM Cloud Pak for Security (CP4S)<=1.7.2.0
IBM Cloud Pak for Security (CP4S)<=1.7.1.0
IBM Cloud Pak for Security (CP4S)<=1.7.0.0
debian/linux
5.10.223-1
5.10.226-1
6.1.106-3
6.1.112-1
6.11.4-1
6.11.5-1

Remedy

As the CAN module will be auto-loaded when required, its use can be disabled by preventing the module from loading with the following instructions: # echo "install can-bcm /bin/true" >> /etc/modprobe.d/disable-can-bcm.conf The system will need to be restarted if the CAN modules are loaded. In most circumstances, the CAN kernel modules will be unable to be unloaded while any network interfaces are active and the protocol is in use. If the system requires this module to work correctly, this mitigation may not be suitable. If you need further assistance, see KCS article https://access.redhat.com/solutions/41278 or contact Red Hat Global Support Services.

Remedy

https://github.com/torvalds/linux/commit/d5f9023fa61ee8b94f37a93f08e94b136cf1e463

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