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    CVE-2020-25857

    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.

    Published:Feb 3, 2021
    Last Modified:Nov 21, 2024
    EPS:Feb 3, 2021
    EPSS Score:0.00151
    CVSS Score:7.5

    Affected Products

    Vendor
    Realtek
    Product
    Rtl8195a
    Vendor
    Realtek
    Product
    Rtl8195a Firmware

    Exploits

    https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2020-27302 (CVSS 8) — A stack buffer overflow in Realtek RTL8710 (and other Ameba-based devices) can lead to remote code execution v…
    CVE-2020-27301 (CVSS 8) — A stack buffer overflow in Realtek RTL8710 (and other Ameba-based devices) can lead to remote code execution v…
    CVE-2020-25853 (CVSS 7.5) — The function CheckMic() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to a…
    CVE-2020-25854 (CVSS 8.1) — The function DecWPA2KeyData() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (u…
    CVE-2020-25855 (CVSS 8.1) — The function AES_UnWRAP() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (up to…
    CVE-2020-25856 (CVSS 8.1) — The function DecWPA2KeyData() in the Realtek RTL8195A Wi-Fi Module prior to versions released in April 2020 (u…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High