CVE Vulnerability

CVE-2019-5023

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.

4.3 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 2.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

Scope

5.9 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784 Exploit Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:official:*:*:*
cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:unofficial:*:*:*
cpe:2.3:a:opensrcsec:pax:*:*:*:*:*:*:*:*
Information

Published : 2019-10-31 09:15

Updated : 2022-06-07 06:41

NVD link : CVE-2019-5023

Mitre link : CVE-2019-5023

Products Affected
No products.
CWE
CWE-772