CVE-2020-25854

CVSS V2 Medium 6.8 CVSS V3 High 8.1
Description
The function DecWPA2KeyData() 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 internal function, rt_arc4_crypt_veneer() or _AES_UnWRAP_veneer(), resulting in a stack buffer overflow which can be exploited for remote code execution or 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 needs to know the network's PSK in order to exploit this.
Overview
  • CVE ID
  • CVE-2020-25854
  • Assigner
  • vuln@vdoo.com
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-02-03T17:15:14
  • Last Modified Date
  • 2021-02-08T18:32:11
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:M/Au:N/C:P/I:P/A:P
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • PARTIAL
  • Base Score
  • 6.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 6.4
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • NONE
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 8.1
  • Base Severity
  • HIGH
  • Exploitability Score
  • 2.2
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/ Exploit Third Party Advisory
History
Created Old Value New Value Data Type Notes
2022-05-10 07:24:01 Added to TrackCVE
2022-12-05 21:18:28 2021-02-03T17:15Z 2021-02-03T17:15:14 CVE Published Date updated
2022-12-05 21:18:28 2021-02-08T18:32:11 CVE Modified Date updated
2022-12-05 21:18:28 Analyzed Vulnerability Status updated