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Vulnerability Details : CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.
Publish Date : 2021-05-27 Last Update Date : 2023-02-24
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- CVSS Scores & Vulnerability Types

CVSS Score
7.2
Confidentiality Impact Complete (There is total information disclosure, resulting in all system files being revealed.)
Integrity Impact Complete (There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the entire system being compromised.)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
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)
CWE ID 787

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:4140: kernel-rt security and bug fix update (Moderate) oval:com.redhat.rhsa:def:20214140 unix
RHSA-2021:4356: kernel security, bug fix, and enhancement update (Moderate) oval:com.redhat.rhsa:def:20214356 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2021-33200

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
3 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
4 Application Netapp Cloud Backup - * * * Version Details Vulnerabilities
5 Application Netapp Solidfire Baseboard Management Controller - * * * Version Details Vulnerabilities
6 Application Netapp Solidfire \& Hci Management Node - * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 2
Linux Linux Kernel 1
Netapp Cloud Backup 1
Netapp Solidfire Baseboard Management Controller 1
Netapp Solidfire \& Hci Management Node 1

- References For CVE-2021-33200

https://lists.fedoraproject.org/archives/list/[email protected]/message/7LR3OKKPHIBGOMHN476CMLW2T7UG53QX/
FEDORA FEDORA-2021-646098b5b8
https://lists.fedoraproject.org/archives/list/[email protected]/message/JJCABL43FT3FKRX5DBPZG25FNKR6CEK4/
FEDORA FEDORA-2021-0b35886add
https://www.openwall.com/lists/oss-security/2021/05/27/1
https://security.netapp.com/advisory/ntap-20210706-0004/ CONFIRM

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0
Vulnerability is valid if product versions listed below are used 0

- Metasploit Modules Related To CVE-2021-33200

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


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