CVE Vulnerability

CVE-2021-33909

fs/seq_file.c in the Linux kernel 3.16 through 5.13.x before 5.13.4 does not properly restrict seq buffer allocations, leading to an integer overflow, an Out-of-bounds Write, and escalation to root by an unprivileged user, aka CID-8cae8cd89f05.

7.2 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7.8 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 Mailing List Patch
https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b Patch Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/07/20/1 Exploit Mailing List
https://lists.debian.org/debian-lts-announce/2021/07/msg00016.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00014.html Mailing List Third Party Advisory
https://www.debian.org/security/2021/dsa-4941 Third Party Advisory
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html Exploit Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/ Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/07/22/7 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html Third Party Advisory VDB Entry
https://security.netapp.com/advisory/ntap-20210819-0004/ Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/25/10 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2021/09/17/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/17/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/21/1 Mailing List Third Party Advisory
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html Third Party Advisory VDB Entry
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015 Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:8.3:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_session_border_controller:8.2:*:*:*:*:*:*:*
Information

Published : 2021-07-20 07:15

Updated : 2022-12-09 06:38

NVD link : CVE-2021-33909

Mitre link : CVE-2021-33909

Products Affected
No products.
CWE
CWE-190

CWE-787