CVE-2019-5023
5.9 · MEDIUMAn 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.…
Overview
CVE-2019-5023 is a medium-severity vulnerability. It was published on October 31, 2019 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How CyberStrike helps
Reason, not just scan
It reasons through your app's logic the way a human pentester would, so it finds flaws signature scanners miss.
Learn moreVerified findings
Every finding is proven exploitable before you see it, which cuts the false positives that bury real risk.
Learn moreAI-driven DAST and SAST
Probe running apps and read source from one engine, so issues are caught before and after they ship.
Learn moreOpen source
Read exactly how it tests and what it reports. CyberStrike is open source and in early access.
View the repo
Frequently asked questions
What is CVE-2019-5023?
CVE-2019-5023 is a medium-severity vulnerability. It was published on October 31, 2019 and has a CVSS 3.1 base score of 5.9 (MEDIUM).
How severe is CVE-2019-5023?
This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2019-5023?
Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2019-5023?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-5023 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
Related MEDIUM CVEs from 2019
View all- 6.9CVE-2019-2438
Vulnerability in the Oracle Web Cache component of Oracle Fusion Middleware (subcomponent: ESI/Parti
View details - 6.9CVE-2019-3646
DLL Search Order Hijacking vulnerability in Microsoft Windows client in McAfee Total Protection (MTP
View details - 6.8CVE-2018-0665
Yamaha routers RT57i Rev.8.00.95 and earlier, RT58i Rev.9.01.51 and earlier, NVR500 Rev.11.00.36 and
View details - 6.8CVE-2018-0666
Yamaha routers RT57i Rev.8.00.95 and earlier, RT58i Rev.9.01.51 and earlier, NVR500 Rev.11.00.36 and
View details - 6.8CVE-2018-0677
BN-SDWBP3 firmware version 1.0.9 and earlier allows attacker with administrator rights on the same n
View details - 6.8CVE-2018-0678
Buffer overflow in BN-SDWBP3 firmware version 1.0.9 and earlier allows an attacker on the same netwo
View details - 6.8CVE-2018-0282
A vulnerability in the TCP socket code of Cisco IOS and IOS XE Software could allow an unauthenticat
View details - 6.8CVE-2018-14666
An improper authorization flaw was found in the Smart Class feature of Foreman. An attacker can use
View details - 6.8CVE-2018-15614
A vulnerability in the one-x Portal component of IP Office could allow an authenticated user to perf
View details - 6.8CVE-2019-6109
An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a
View details - 6.8CVE-2019-6110
In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious
View details - 6.8CVE-2018-1675
IBM Tivoli Application Dependency Discovery Manager 7.2.2 and 7.3 could expose password hashes in st
View details