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CVE-2021-20194

CVSS v3.1 7.8 (High)
78% Progress
CVSS v2.0 4.6 (Medium)
46% Progress
EPSS 0.04 % (5th)
0.04% Progress
Affected Products 3
Advisories 11
Info CVSS EPSS CAPEC Affected Configurations References Security Advisories Packages & Software OVAL Tools, Exploits & PoC Graph Web & Social Timeline

There is a vulnerability in the linux kernel versions higher than 5.2 (if kernel compiled with config params CONFIG_BPF_SYSCALL=y , CONFIG_BPF=y , CONFIG_CGROUPS=y , CONFIG_CGROUP_BPF=y , CONFIG_HARDENED_USERCOPY not set, and BPF hook to getsockopt is registered). As result of BPF execution, the local user can trigger bug in __cgroup_bpf_run_filter_getsockopt() function that can lead to heap overflow (because of non-hardened usercopy). The impact of attack could be deny of service or possibly privileges escalation.

Weaknesses
CWE-20
Improper Input Validation
CWE-787
Out-of-bounds Write
CVE Status
PUBLISHED
CNA
Red Hat, Inc.
Published Date
2021-02-23 23:15:13
(3 years ago)
Updated Date
2023-02-12 22:15:16
(19 months ago)

Affected Products

Linux

Redhat

Configuration #1

    CPE23 From Up To
  Linux Kernel above 5.2 version cpe:2.3:o:linux:linux_kernel > 5.2

Configuration #2

    CPE23 From Up To
  Redhat Openshift Container Platform 4.4 cpe:2.3:a:redhat:openshift_container_platform:4.4
  Redhat Openshift Container Platform 4.5 cpe:2.3:a:redhat:openshift_container_platform:4.5
  Redhat Openshift Container Platform 4.6 cpe:2.3:a:redhat:openshift_container_platform:4.6
  Redhat Enterprise Linux 8.0 cpe:2.3:o:redhat:enterprise_linux:8.0