CVE-2019-5023
CVSS V2 Medium 4.3
CVSS V3 Medium 5.9
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.
Overview
- CVE ID
- CVE-2019-5023
- Assigner
- talos-cna@cisco.com
- Vulnerability Status
- Analyzed
- Published Version
- 2019-10-31T21:15:13
- Last Modified Date
- 2022-06-07T18:41:22
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:official:*:*:* | 1 | OR | 3.1-4.9.8-201702060653 | 3.1-4.9.24-201704252333 |
| cpe:2.3:a:opensrcsec:grsecurity:*:*:*:*:unofficial:*:*:* | 1 | OR | 4.9.25 | 4.9.74 |
| cpe:2.3:a:opensrcsec:pax:*:*:*:*:*:*:*:* | 1 | OR | pax-linux-4.9.8-test1 | pax-linux-4.9.8-test7 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- HIGH
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 5.9
- Base Severity
- MEDIUM
- Exploitability Score
- 2.2
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://talosintelligence.com/vulnerability_reports/TALOS-2019-0784 | Exploit Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2019-5023 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-5023 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-04-20 17:01:13 | Added to TrackCVE | |||
| 2022-12-04 05:18:04 | 2019-10-31T21:15Z | 2019-10-31T21:15:13 | CVE Published Date | updated |
| 2022-12-04 05:18:04 | 2022-06-07T18:41:22 | CVE Modified Date | updated | |
| 2022-12-04 05:18:04 | Analyzed | Vulnerability Status | updated |