CVE-2021-33909

CVSS V2 High 7.2 CVSS V3 High 7.8
Description
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.
Overview
  • CVE ID
  • CVE-2021-33909
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-07-20T19:15:09
  • Last Modified Date
  • 2023-03-01T20:14:26
Weakness Enumerations
CWE URL
CWE-190 http://cwe.mitre.org/data/definitions/190.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 3.16 5.13.4
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:oracle:communications_session_border_controller:8.2:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:oracle:communications_session_border_controller:8.3:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:oracle:communications_session_border_controller:8.4:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:oracle:communications_session_border_controller:9.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.2
  • Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html Exploit Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/163671/Kernel-Live-Patch-Security-Notice-LSN-0079-1.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/164155/Kernel-Live-Patch-Security-Notice-LSN-0081-1.html Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/165477/Kernel-Live-Patch-Security-Notice-LSN-0083-1.html Third Party Advisory VDB Entry
http://www.openwall.com/lists/oss-security/2021/07/22/7 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/08/25/10 Mailing List Third Party Advisory
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
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4 Mailing List Patch Vendor Advisory
https://github.com/torvalds/linux/commit/8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/07/msg00014.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/msg00016.html Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/ Mailing List Third Party Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015
https://security.netapp.com/advisory/ntap-20210819-0004/ Third Party Advisory
https://www.debian.org/security/2021/dsa-4941 Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/07/20/1 Exploit Mailing List Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-33909
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33909
History
Created Old Value New Value Data Type Notes
2022-05-10 15:47:49 Added to TrackCVE
2022-12-05 06:30:31 2021-07-20T19:15Z 2021-07-20T19:15:09 CVE Published Date updated
2022-12-05 06:30:31 2022-08-10T20:15:20 CVE Modified Date updated
2022-12-05 06:30:31 Undergoing Analysis Vulnerability Status updated
2022-12-05 06:30:36 References updated
2022-12-09 19:13:58 2022-12-09T18:38:51 CVE Modified Date updated
2022-12-09 19:13:58 Undergoing Analysis Analyzed Vulnerability Status updated
2023-03-01 13:11:54 Analyzed Undergoing Analysis Vulnerability Status updated
2023-03-01 13:11:55 Weakness Enumeration update
2023-03-01 22:13:32 2023-03-01T20:14:26 CVE Modified Date updated
2023-03-01 22:13:32 Undergoing Analysis Analyzed Vulnerability Status updated