CVE-2021-4090

CVSS V2 Medium 6.6 CVSS V3 High 7.1
Description
An out-of-bounds (OOB) memory write flaw was found in the NFSD in the Linux kernel. Missing sanity may lead to a write beyond bmval[bmlen-1] in nfsd4_decode_bitmap4 in fs/nfsd/nfs4xdr.c. In this flaw, a local attacker with user privilege may gain access to out-of-bounds memory, leading to a system integrity and confidentiality threat.
Overview
  • CVE ID
  • CVE-2021-4090
  • Assigner
  • secalert@redhat.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2022-02-18T18:15:10
  • Last Modified Date
  • 2022-12-13T20:40:39
Weakness Enumerations
CWE URL
CWE-787 http://cwe.mitre.org/data/definitions/787.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 1 OR 5.16
cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:* 1 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h300s_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h300s:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h500s_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h500s:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h700s_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h700s:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h300e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h300e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h500e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h500e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h700e_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h700e:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h410s_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h410s:-:*:*:*:*:*:*:* 0 OR
AND
cpe:2.3:o:netapp:baseboard_management_controller_h410c_firmware:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:h:netapp:baseboard_management_controller_h410c:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:C/I:C/A:N
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • NONE
  • Base Score
  • 6.6
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.9
  • Impact Score
  • 9.2
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:N
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 7.1
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.8
  • Impact Score
  • 5.2
References
Reference URL Reference Tags
https://bugzilla.redhat.com/show_bug.cgi?id=2025101 Issue Tracking Patch Third Party Advisory
https://lore.kernel.org/linux-nfs/163692036074.16710.5678362976688977923.stgit@klimt.1015granger.net/ Patch Vendor Advisory
https://security.netapp.com/advisory/ntap-20220318-0010/
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-4090
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4090
History
Created Old Value New Value Data Type Notes
2022-05-10 15:45:16 Added to TrackCVE
2022-12-06 10:09:01 2022-02-18T18:15Z 2022-02-18T18:15:10 CVE Published Date updated
2022-12-06 10:09:01 2022-10-07T14:16:12 CVE Modified Date updated
2022-12-06 10:09:01 Undergoing Analysis Vulnerability Status updated
2022-12-13 21:13:10 2022-12-13T20:40:39 CVE Modified Date updated
2022-12-13 21:13:10 Undergoing Analysis Analyzed Vulnerability Status updated