Realtek RTL8195A prior 2.08 WPA2 Handshake ClientEAPOLKeyRecvd size stack-based overflow
|CVSS Meta Temp Score|
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|CTI Interest Score|
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A vulnerability was found in Realtek RTL8195A. It has been declared as critical. Affected by this vulnerability is the function
ClientEAPOLKeyRecvd of the component WPA2 Handshake Handler. The manipulation of the argument
size with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-121. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:
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.
The weakness was released 02/04/2021. It is possible to read the advisory at vdoo.com. This vulnerability is known as CVE-2020-25857 since 09/23/2020. The exploitation appears to be easy. The attack can only be initiated within the local network. A single authentication is required for exploitation. Technical details of the vulnerability are known, but there is no available exploit.
Upgrading to version 2.08 eliminates this vulnerability.
CVSSv3VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3
VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
ExploitingClass: Memory corruption
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒
Threat IntelligenceThreat: 🔍
0-Day Time: 🔒
Upgrade: RTL8195A 2.08
Timeline09/23/2020 CVE assigned
02/04/2021 +134 days Advisory disclosed
02/04/2021 +0 days VulDB entry created
02/23/2021 +19 days VulDB last update
CVE: CVE-2020-25857 (🔒)
EntryCreated: 02/04/2021 10:37 AM
Updated: 02/23/2021 12:54 PM
Changes: (6) source_cve_assigned source_cve_nvd_summary advisory_confirm_url vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
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