high
7.8
CWE
77 119
Advisory Published
CVE Published
Updated

CVE-2021-29154: Command Injection

First published: Tue Apr 06 2021(Updated: )

A flaw was found in the Linux kernels eBPF implementation. By default, accessing the eBPF verifier is only accessible to privileged users with CAP_SYS_ADMIN. A local user with the ability to insert eBPF instructions can abuse a flaw in eBPF to corrupt memory. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:3.10.0-1160.41.1.rt56.1181.el7
0:3.10.0-1160.41.1.rt56.1181.el7
redhat/kernel<0:3.10.0-1160.41.1.el7
0:3.10.0-1160.41.1.el7
redhat/kernel-rt<0:4.18.0-372.9.1.rt7.166.el8
0:4.18.0-372.9.1.rt7.166.el8
redhat/kernel<0:4.18.0-372.9.1.el8
0:4.18.0-372.9.1.el8
Linux Linux kernel>=3.0<4.4.266
Linux Linux kernel>=4.5<4.9.266
Linux Linux kernel>=4.10<4.14.230
Linux Linux kernel>=4.15<4.19.186
Linux Linux kernel>=4.20<5.4.111
Linux Linux kernel>=5.5<5.10.29
Linux Linux kernel>=5.11<5.11.13
Fedoraproject Fedora=33
Debian Debian Linux=9.0
Netapp Cloud Backup
Netapp Hci Management Node
Netapp Solidfire
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
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
IBM DRM<=2.0.6
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.12.5-1
6.12.6-1
>=3.0<4.4.266
>=4.5<4.9.266
>=4.10<4.14.230
>=4.15<4.19.186
>=4.20<5.4.111
>=5.5<5.10.29
>=5.11<5.11.13
=33
=9.0
All of
All of
All of
All of
All of
All of
All of

Remedy

This issue does not affect most systems by default. An administrator would need to have enabled the BPF JIT to be affected. It can be disabled immediately with the command: # echo 0 > /proc/sys/net/core/bpf_jit_enable Or it can be disabled for all subsequent boots of the system by setting a value in /etc/sysctl.d/44-bpf-jit-disable ## start file ## net.core.bpf_jit_enable=0 ## end file ##

Remedy

https://www.openwall.com/lists/oss-security/2021/04/08/1

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