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Vulnerability Details : CVE-2021-3679

A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.
Publish Date : 2021-08-05 Last Update Date : 2022-01-01
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- CVSS Scores & Vulnerability Types

CVSS Score
2.1
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
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) Denial Of Service
CWE ID 400

- 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-2021-3679

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 9.0 * * * Version Details Vulnerabilities
2 OS Debian Debian Linux 10.0 * * * Version Details Vulnerabilities
3 OS Linux Linux Kernel * * * * Version Details Vulnerabilities
4 OS Linux Linux Kernel 5.14 - * * Version Details Vulnerabilities
5 OS Linux Linux Kernel 5.14 RC1 * * Version Details Vulnerabilities
6 OS Linux Linux Kernel 5.14 RC2 * * Version Details Vulnerabilities
7 OS Redhat Enterprise Linux 8.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 2
Linux Linux Kernel 4
Redhat Enterprise Linux 1

- References For CVE-2021-3679

https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html
MLIST [debian-lts-announce] 20211216 [SECURITY] [DLA 2843-1] linux security update
https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html
MLIST [debian-lts-announce] 20211015 [SECURITY] [DLA 2785-1] linux-4.19 security update
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=67f0d6d9883c13174669f88adac4f0ee656cc16a
https://www.debian.org/security/2021/dsa-4978
DEBIAN DSA-4978
https://bugzilla.redhat.com/show_bug.cgi?id=1989165

- Metasploit Modules Related To CVE-2021-3679

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


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