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Vulnerability Details : CVE-2021-20194

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.
Publish Date : 2021-02-23 Last Update Date : 2021-03-31
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- CVSS Scores & Vulnerability Types

CVSS Score
4.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact Partial (Modification of some system files or information is possible, but the attacker does not have control over what can be modified, or the scope of what the attacker can affect is limited.)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Overflow
CWE ID 20

- Products Affected By CVE-2021-20194

# Product Type Vendor Product Version Update Edition Language
1 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
2 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities
3 Application Redhat Openshift Container Platform 4.4 * * * Version Details Vulnerabilities
4 Application Redhat Openshift Container Platform 4.5 * * * Version Details Vulnerabilities
5 Application Redhat Openshift Container Platform 4.6 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Linux Linux Kernel 1
Redhat Enterprise Linux 1
Redhat Openshift Container Platform 3

- References For CVE-2021-20194

https://bugzilla.redhat.com/show_bug.cgi?id=1912683
https://security.netapp.com/advisory/ntap-20210326-0003/ CONFIRM

- Metasploit Modules Related To CVE-2021-20194

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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