CVE-2020-25857
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
The function ClientEAPOLKeyRecvd() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to and excluding 2.08) does not validate the size parameter for an rtl_memcpy() operation, resulting in a stack buffer overflow which can be exploited for denial of service. An attacker can impersonate an Access Point and attack a vulnerable Wi-Fi client, by injecting a crafted packet into the WPA2 handshake. The attacker does not need to know the network's PSK.
Overview
- CVE ID
- CVE-2020-25857
- Assigner
- vuln@vdoo.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-02-03T17:15:15
- Last Modified Date
- 2021-02-08T19:19:26
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| AND | ||||
| cpe:2.3:o:realtek:rtl8195a_firmware:*:*:*:*:*:*:*:* | 1 | OR | 2.08 | |
| cpe:2.3:h:realtek:rtl8195a:-:*:*:*:*:*:*:* | 0 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/ | Exploit Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-25857 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25857 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:24:00 | Added to TrackCVE | |||
| 2022-12-05 21:18:41 | 2021-02-03T17:15Z | 2021-02-03T17:15:15 | CVE Published Date | updated |
| 2022-12-05 21:18:41 | 2021-02-08T19:19:26 | CVE Modified Date | updated | |
| 2022-12-05 21:18:41 | Analyzed | Vulnerability Status | updated |