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ID

VAR-202102-0234


CVE

CVE-2020-25857


TITLE

Realtek RTL8195A Wi-Fi  Out-of-bounds write vulnerability in module

Trust: 0.8

sources: JVNDB: JVNDB-2020-015876

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. Realtek RTL8195A Wi-Fi The module contains a vulnerability related to out-of-bounds writing.Denial of service (DoS) It may be put into a state. Realtek RTL8195A is an IoT microcontroller from Taiwan Realtek Semiconductor (Realtek). Realtek RTL8195A versions prior to 2.08 have a buffer overflow vulnerability

Trust: 2.79

sources: NVD: CVE-2020-25857 // JVNDB: JVNDB-2020-015876 // CNVD: CNVD-2021-56814 // CNNVD: CNNVD-202102-230 // VULMON: CVE-2020-25857

IOT TAXONOMY

category:['IoT']sub_category: -

Trust: 0.6

category:['other device', 'embedded device']sub_category:chip

Trust: 0.1

category:['other device', 'embedded device']sub_category:general

Trust: 0.1

sources: OTHER: None // CNVD: CNVD-2021-56814

AFFECTED PRODUCTS

vendor:realtekmodel:rtl8195ascope:ltversion:2.08

Trust: 1.6

vendor:realtek semiconductor corpmodel:rtl8195ascope:eqversion: -

Trust: 0.8

vendor:realtek semiconductor corpmodel:rtl8195ascope:eqversion:rtl8195a firmware 2020 year 4 before the month (2.08

Trust: 0.8

vendor:realtek semiconductor corpmodel:rtl8195ascope:ltversion:)

Trust: 0.8

sources: CNVD: CNVD-2021-56814 // JVNDB: JVNDB-2020-015876 // NVD: CVE-2020-25857

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2020-25857
value: HIGH

Trust: 1.0

NVD: CVE-2020-25857
value: HIGH

Trust: 0.8

CNVD: CNVD-2021-56814
value: MEDIUM

Trust: 0.6

CNNVD: CNNVD-202102-230
value: HIGH

Trust: 0.6

nvd@nist.gov: CVE-2020-25857
severity: MEDIUM
baseScore: 5.0
vectorString: AV:N/AC:L/AU:N/C:N/I:N/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 10.0
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.8

CNVD: CNVD-2021-56814
severity: MEDIUM
baseScore: 5.0
vectorString: AV:N/AC:L/AU:N/C:N/I:N/A:P
accessVector: NETWORK
accessComplexity: LOW
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 10.0
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.6

nvd@nist.gov: CVE-2020-25857
baseSeverity: HIGH
baseScore: 7.5
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
exploitabilityScore: 3.9
impactScore: 3.6
version: 3.1

Trust: 1.0

NVD: CVE-2020-25857
baseSeverity: HIGH
baseScore: 7.5
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

sources: CNVD: CNVD-2021-56814 // JVNDB: JVNDB-2020-015876 // CNNVD: CNNVD-202102-230 // NVD: CVE-2020-25857

PROBLEMTYPE DATA

problemtype:CWE-121

Trust: 1.0

problemtype:CWE-787

Trust: 1.0

problemtype:Out-of-bounds writing (CWE-787) [NVD Evaluation ]

Trust: 0.8

sources: JVNDB: JVNDB-2020-015876 // NVD: CVE-2020-25857

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202102-230

TYPE

buffer error

Trust: 0.6

sources: CNNVD: CNNVD-202102-230

PATCH

title:Security Bulletin (April 2020)url:https://www.amebaiot.com/en/security_bulletin/

Trust: 0.8

title:Patch for Realtek RTL8195A buffer overflow vulnerability (CNVD-2021-56814)url:https://www.cnvd.org.cn/patchInfo/show/283541

Trust: 0.6

title:Realtek RTL8195AM Buffer error vulnerability fixurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=141103

Trust: 0.6

sources: CNVD: CNVD-2021-56814 // JVNDB: JVNDB-2020-015876 // CNNVD: CNNVD-202102-230

EXTERNAL IDS

db:NVDid:CVE-2020-25857

Trust: 3.2

db:JVNDBid:JVNDB-2020-015876

Trust: 0.8

db:CNVDid:CNVD-2021-56814

Trust: 0.6

db:CNNVDid:CNNVD-202102-230

Trust: 0.6

db:OTHERid:NONE

Trust: 0.1

db:VULMONid:CVE-2020-25857

Trust: 0.1

sources: OTHER: None // CNVD: CNVD-2021-56814 // VULMON: CVE-2020-25857 // JVNDB: JVNDB-2020-015876 // CNNVD: CNNVD-202102-230 // NVD: CVE-2020-25857

REFERENCES

url:https://nvd.nist.gov/vuln/detail/cve-2020-25857

Trust: 2.0

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

Trust: 1.7

url:https://jfrog.com/blog/major-vulnerabilities-discovered-and-patched-in-realtek-rtl8195a-wi-fi-module/

Trust: 0.8

url:https://ieeexplore.ieee.org/abstract/document/10769424

Trust: 0.1

url:https://nvd.nist.gov

Trust: 0.1

url:https://exchange.xforce.ibmcloud.com/vulnerabilities/196130

Trust: 0.1

sources: OTHER: None // CNVD: CNVD-2021-56814 // VULMON: CVE-2020-25857 // JVNDB: JVNDB-2020-015876 // CNNVD: CNNVD-202102-230 // NVD: CVE-2020-25857

SOURCES

db:OTHERid: -
db:CNVDid:CNVD-2021-56814
db:VULMONid:CVE-2020-25857
db:JVNDBid:JVNDB-2020-015876
db:CNNVDid:CNNVD-202102-230
db:NVDid:CVE-2020-25857

LAST UPDATE DATE

2025-01-30T19:51:01.168000+00:00


SOURCES UPDATE DATE

db:CNVDid:CNVD-2021-56814date:2021-07-30T00:00:00
db:VULMONid:CVE-2020-25857date:2021-02-08T00:00:00
db:JVNDBid:JVNDB-2020-015876date:2021-10-20T07:51:00
db:CNNVDid:CNNVD-202102-230date:2021-02-09T00:00:00
db:NVDid:CVE-2020-25857date:2024-11-21T05:18:54.987

SOURCES RELEASE DATE

db:CNVDid:CNVD-2021-56814date:2021-07-30T00:00:00
db:VULMONid:CVE-2020-25857date:2021-02-03T00:00:00
db:JVNDBid:JVNDB-2020-015876date:2021-10-20T00:00:00
db:CNNVDid:CNNVD-202102-230date:2021-02-03T00:00:00
db:NVDid:CVE-2020-25857date:2021-02-03T17:15:15.747