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.
References
Link | Resource |
---|---|
https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784 | Exploit Third Party Advisory |
History
No history.
MITRE Information
Status: PUBLISHED
Assigner: talos
Published: 2019-10-31T20:15:40
Updated: 2022-04-19T17:32:57
Reserved: 2019-01-04T00:00:00
Link: CVE-2019-5023
JSON object: View
NVD Information
Status : Analyzed
Published: 2019-10-31T21:15:13.373
Modified: 2022-06-07T18:41:22.710
Link: CVE-2019-5023
JSON object: View
Redhat Information
No data.