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Vulnerability Details : CVE-2020-29661

A locking issue was discovered in the tty subsystem of the Linux kernel through 5.9.13. drivers/tty/tty_jobctrl.c allows a use-after-free attack against TIOCSPGRP, aka CID-54ffccbf053b.
Publish Date : 2020-12-09 Last Update Date : 2021-03-09
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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 416

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2021:0537: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20210537 unix
RHSA-2021:0558: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20210558 unix
RHSA-2021:0856: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20210856 unix
RHSA-2021:0857: kernel-rt security and bug fix update (Important) oval:com.redhat.rhsa:def:20210857 unix
RHSA-2021:0862: kpatch-patch security update (Important) oval:com.redhat.rhsa:def:20210862 unix
RHSA-2021:1288: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20211288 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-2020-29661

# Product Type Vendor Product Version Update Edition Language
1 OS Fedoraproject Fedora 32 * * * Version Details Vulnerabilities
2 OS Fedoraproject Fedora 33 * * * Version Details Vulnerabilities
3 OS Linux Linux Kernel * * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Fedora 2
Linux Linux Kernel 1

- References For CVE-2020-29661

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=54ffccbf053b5b6ca4f6e45094b942fab92a25fc
http://www.openwall.com/lists/oss-security/2020/12/10/1
MLIST [oss-security] 20201210 2 kernel issues
https://lists.fedoraproject.org/archives/list/[email protected]/message/BOB25SU6XUL4TNP7KB63WNZSYTIYFDPP/
FEDORA FEDORA-2020-bc0cc81a7a
https://lists.fedoraproject.org/archives/list/[email protected]/message/MZ7OAKAEFAXQRGBZK4LYUWINCD3D2XCL/
FEDORA FEDORA-2020-b732958765
http://packetstormsecurity.com/files/160681/Linux-TIOCSPGRP-Broken-Locking.html
https://security.netapp.com/advisory/ntap-20210122-0001/ CONFIRM
https://www.debian.org/security/2021/dsa-4843
DEBIAN DSA-4843
https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
MLIST [debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security update
https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
MLIST [debian-lts-announce] 20210309 [SECURITY] [DLA 2586-1] linux security update

- Metasploit Modules Related To CVE-2020-29661

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


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