NVD

CVE-2021-33909 Detail

Modified

This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 7.8 HIGH

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 7.2 HIGH

Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://packetstormsecurity.com/files/163621/Sequoia-A-Deep-Root-In-Linuxs-Filesystem-Layer.html	Exploit Third Party Advisory VDB Entry
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/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/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://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/2021/07/22/7	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/2021/08/25/10	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/2021/09/17/2	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/2021/09/17/4	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/21/1	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://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://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/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/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.debian.org/debian-lts-announce/2021/07/msg00016.html	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z4UHHIGISO3FVRF4CQNJS4IKA25ATSFU/
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015	Third Party Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0015	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210819-0004/	Third Party Advisory
https://security.netapp.com/advisory/ntap-20210819-0004/	Third Party Advisory
https://www.debian.org/security/2021/dsa-4941	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.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
https://www.oracle.com/security-alerts/cpujan2022.html	Patch Third Party Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-190	Integer Overflow or Wraparound	NIST
CWE-787	Out-of-bounds Write	NIST

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
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Change History

23 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-33909
NVD Published Date:
07/20/2021
NVD Last Modified:
11/21/2024
Source:
MITRE

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-33909 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CVE 11/21/2024 1:09:45 AM

CVE Modified by MITRE 5/14/2024 5:11:53 AM

CVE Modified by MITRE 11/06/2023 10:35:56 PM

Reanalysis by NIST 3/01/2023 3:14:26 PM

Modified Analysis by NIST 12/09/2022 1:38:51 PM

CVE Modified by MITRE 8/10/2022 4:15:20 PM

Modified Analysis by NIST 3/01/2022 2:17:05 PM

CVE Modified by MITRE 2/07/2022 11:16:02 AM

CVE Modified by MITRE 1/06/2022 3:15:08 PM

Modified Analysis by NIST 10/18/2021 8:55:37 AM

CVE Modified by MITRE 9/21/2021 8:15:08 AM

CVE Modified by MITRE 9/17/2021 2:15:08 PM

CVE Modified by MITRE 9/17/2021 5:15:09 AM

CVE Modified by MITRE 9/14/2021 2:15:08 PM

CVE Modified by MITRE 8/25/2021 8:15:09 PM

CVE Modified by MITRE 8/19/2021 6:15:08 AM

Initial Analysis by NIST 7/29/2021 1:46:52 PM

CVE Modified by MITRE 7/26/2021 2:15:08 PM

CVE Modified by MITRE 7/22/2021 8:15:07 PM

CVE Modified by MITRE 7/21/2021 11:15:34 PM

CVE Modified by MITRE 7/21/2021 2:15:09 PM

CVE Modified by MITRE 7/21/2021 11:16:20 AM

CVE Modified by MITRE 7/20/2021 6:15:08 PM

Quick Info