Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2021-3490 First vendor Publication 2021-06-04
Vendor Cve Last vendor Modification 2021-07-16

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

The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. This issue was fixed via commit 049c4e13714e ("bpf: Fix alu32 const subreg bound tracking on bitwise operations") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. The AND/OR issues were introduced by commit 3f50f132d840 ("bpf: Verifier, do explicit ALU32 bounds tracking") (5.7-rc1) and the XOR variant was introduced by 2921c90d4718 ("bpf:Fix a verifier failure with xor") ( 5.10-rc1).

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3490

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-787 Out-of-bounds Write (CWE/SANS Top 25)
50 % CWE-125 Out-of-bounds Read

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3
Os 3398

Sources (Detail)

Source Url
CONFIRM https://security.netapp.com/advisory/ntap-20210716-0004/
MISC https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/commit/?id=049c4e...
https://www.zerodayinitiative.com/advisories/ZDI-21-606/
MLIST https://www.openwall.com/lists/oss-security/2021/05/11/11
UBUNTU https://ubuntu.com/security/notices/USN-4949-1
https://ubuntu.com/security/notices/USN-4950-1

Alert History

If you want to see full details history, please login or register.
0
1
2
3
4
5
6
7
Date Informations
2021-07-16 21:23:21
  • Multiple Updates
2021-07-16 17:22:57
  • Multiple Updates
2021-06-14 21:23:18
  • Multiple Updates
2021-06-12 00:22:53
  • Multiple Updates
2021-06-05 01:44:36
  • Multiple Updates
2021-06-05 01:44:35
  • Multiple Updates
2021-06-04 17:22:49
  • Multiple Updates
2021-06-04 09:22:48
  • First insertion