CVE-2020-25221
Linux Kernel Privilege Escalation through Gate Page Mishandling in Linux
Description
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.
INFO
Published Date :
Sept. 10, 2020, 2:15 p.m.
Last Modified :
Feb. 2, 2023, 10:23 p.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.9
Exploitability Score :
1.8
Public PoC/Exploit Available at Github
CVE-2020-25221 has a 4 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2020-25221
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-25221.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2020/09/10/4 | Mailing List Third Party Advisory |
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 | Release Notes Vendor Advisory |
| https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a | Issue Tracking Patch Vendor Advisory |
| https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 | Issue Tracking Patch Vendor Advisory |
| https://security.netapp.com/advisory/ntap-20201001-0003/ | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2020/09/08/4 | Mailing List Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE Exploit PoC's
C Makefile Shell M4 Roff Perl Yacc Lex Pascal Python
None
CVE Data Analysis, CVE Monitor, CVE EXP Prediction Based on Deep Learning. 1999-2020年存量CVE数据分析、监控CVE增量更新、基于深度学习的CVE EXP预测和自动化推送
Python
A collection of proof-of-concept exploit scripts written by the STAR Labs team for various CVEs that they discovered or found by others.
JavaScript HTML Python Shell C Makefile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-25221 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-25221 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Feb. 02, 2023
Action Type Old Value New Value Changed Reference Type http://www.openwall.com/lists/oss-security/2020/09/10/4 Third Party Advisory http://www.openwall.com/lists/oss-security/2020/09/10/4 Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20201001-0003/ No Types Assigned https://security.netapp.com/advisory/ntap-20201001-0003/ Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire\,_enterprise_sds_\&_hci_storage_node:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:solidfire_\&_hci_management_node:-:*:*:*:*:*:*:* *cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* *cpe:2.3:h:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Oct. 01, 2020
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20201001-0003/ [No Types Assigned] -
Initial Analysis by [email protected]
Sep. 15, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type http://www.openwall.com/lists/oss-security/2020/09/10/4 No Types Assigned http://www.openwall.com/lists/oss-security/2020/09/10/4 Third Party Advisory Changed Reference Type https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 No Types Assigned https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.7 Release Notes, Vendor Advisory Changed Reference Type https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a No Types Assigned https://git.kernel.org/linus/8891adc61dce2a8a41fc0c23262b681c3ec4b73a Issue Tracking, Patch, Vendor Advisory Changed Reference Type https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 No Types Assigned https://git.kernel.org/linus/9fa2dd946743ae6f30dc4830da19147bf100a7f2 Issue Tracking, Patch, Vendor Advisory Changed Reference Type https://www.openwall.com/lists/oss-security/2020/09/08/4 No Types Assigned https://www.openwall.com/lists/oss-security/2020/09/08/4 Mailing List, Patch, Third Party Advisory Added CWE NIST CWE-672 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.7.0 up to (excluding) 5.8.7 -
CVE Modified by [email protected]
Sep. 10, 2020
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2020/09/10/4 [No Types Assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-25221 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-25221
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} 0.00%
score
0.12065
percentile