CVE-2019-5023
Grsecurity PaX read_kmem Memory Leakage
Description
An exploitable vulnerability exists in the grsecurity PaX patch for the function read_kmem, in PaX from version pax-linux-4.9.8-test1 to 4.9.24-test7, grsecurity official from version grsecurity-3.1-4.9.8-201702060653 to grsecurity-3.1-4.9.24-201704252333, grsecurity unofficial from version v4.9.25-unofficialgrsec to v4.9.74-unofficialgrsec. PaX adds a temp buffer to the read_kmem function, which is never freed when an invalid address is supplied. This results in a memory leakage that can lead to a crash of the system. An attacker needs to induce a read to /dev/kmem using an invalid address to exploit this vulnerability.
INFO
Published Date :
Oct. 31, 2019, 9:15 p.m.
Last Modified :
June 7, 2022, 6:41 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.2
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-2019-5023.
| URL | Resource |
|---|---|
| https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784 | Exploit 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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-5023 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-5023 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]
Jun. 07, 2022
Action Type Old Value New Value -
CVE Modified by [email protected]
Apr. 29, 2022
Action Type Old Value New Value Added CWE Talos CWE-401 -
CVE Modified by [email protected]
Apr. 19, 2022
Action Type Old Value New Value Added CVSS V3 Talos AV:L/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H -
Reanalysis by [email protected]
May. 26, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:gresecurity:gresecurity:*:*:*:*:official:*:*:* versions from (including) 3.1-4.9.8-201702060653 up to (including) 3.1-4.9.24-201704252333 *cpe:2.3:a:gresecurity:gresecurity:*:*:*:*:unofficial:*:*:* versions from (including) 4.9.25 up to (including) 4.9.74 *cpe:2.3:a:gresecurity:pax:*:*:*:*:*:*:*:* versions from (including) pax-linux-4.9.8-test1 up to (including) pax-linux-4.9.8-test7 OR *cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:official:*:*:* versions from (including) 3.1-4.9.8-201702060653 up to (including) 3.1-4.9.24-201704252333 *cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:unofficial:*:*:* versions from (including) 4.9.25 up to (including) 4.9.74 *cpe:2.3:a:opensrcsec:pax:*:*:*:*:*:*:*:* versions from (including) pax-linux-4.9.8-test1 up to (including) pax-linux-4.9.8-test7 -
Initial Analysis by [email protected]
Nov. 06, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784 No Types Assigned https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784 Exploit, Third Party Advisory Added CWE NIST CWE-772 Added CPE Configuration OR *cpe:2.3:a:gresecurity:gresecurity:*:*:*:*:official:*:*:* versions from (including) 3.1-4.9.8-201702060653 up to (including) 3.1-4.9.24-201704252333 *cpe:2.3:a:gresecurity:gresecurity:*:*:*:*:unofficial:*:*:* versions from (including) 4.9.25 up to (including) 4.9.74 *cpe:2.3:a:gresecurity:pax:*:*:*:*:*:*:*:* versions from (including) pax-linux-4.9.8-test1 up to (including) pax-linux-4.9.8-test7
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-5023 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-2019-5023
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} 0.00%
score
0.43461
percentile