Executive Summary

Informations
Name CVE-2020-25221 First vendor Publication 2020-09-10
Vendor Cve Last vendor Modification 2020-10-01

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

get_gate_page in mm/gup.c in the Linux kernel 5.7.x and 5.8.x before 5.8.7 allows privilege escalation because of incorrect reference counting (caused by gate page mishandling) of the struct page that backs the vsyscall page. The result is a refcount underflow. This can be triggered by any 64-bit process that can use ptrace() or process_vm_readv(), aka CID-9fa2dd946743.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25221

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-672 Operation on a Resource after Expiration or Release

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3344

Sources (Detail)

Source Url
CONFIRM https://security.netapp.com/advisory/ntap-20201001-0003/
MISC https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7
https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a
https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2
https://www.openwall.com/lists/oss-security/2020/09/08/4
MLIST http://www.openwall.com/lists/oss-security/2020/09/10/4

Alert History

If you want to see full details history, please login or register.
0
1
2
3
4
5
6
7
Date Informations
2020-10-01 21:23:09
  • Multiple Updates
2020-09-25 01:28:31
  • Multiple Updates
2020-09-23 00:22:56
  • Multiple Updates
2020-09-22 21:23:11
  • Multiple Updates
2020-09-16 21:23:16
  • Multiple Updates
2020-09-15 21:23:15
  • Multiple Updates
2020-09-11 00:22:52
  • Multiple Updates
2020-09-10 21:23:14
  • First insertion