Executive Summary

Informations
Name CVE-2021-3492 First vendor Publication 2021-04-17
Vendor Cve Last vendor Modification 2021-05-21

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3492

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-415 Double Free
50 % CWE-401 Failure to Release Memory Before Removing Last Reference ('Memory Leak')

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 60

Sources (Detail)

Source Url
MISC http://packetstormsecurity.com/files/162614/Kernel-Live-Patch-Security-Notice...
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/comm...
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/comm...
https://ubuntu.com/security/notices/USN-4917-1
https://www.openwall.com/lists/oss-security/2021/04/16/2
https://www.zerodayinitiative.com/advisories/ZDI-21-422/

Alert History

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Date Informations
2021-05-21 21:23:25
  • Multiple Updates
2021-05-19 00:23:05
  • Multiple Updates
2021-05-04 14:10:02
  • Multiple Updates
2021-04-23 01:10:34
  • Multiple Updates
2021-04-22 00:23:24
  • Multiple Updates
2021-04-19 17:22:59
  • Multiple Updates
2021-04-17 12:37:39
  • First insertion