cnvd - cnvd-2021-56815

CNVD-2021-56815

Vulnerability from cnvd - Published: 2021-07-30

Title

Realtek RTL8195A缓冲区溢出漏洞（CNVD-2021-56815）

Description

Realtek RTL8195A是中国台湾瑞昱半导体（Realtek）公司的一款物联网微控制器。 Realtek RTL8195A 2.08之前版本存在缓冲区溢出漏洞，攻击者可利用该漏洞将精心设计的数据包注入WPA2握手来模拟接入点并攻击易受攻击的Wi-Fi客户端。

Severity

中

Patch Name

Realtek RTL8195A缓冲区溢出漏洞（CNVD-2021-56815）的补丁

Patch Description

Realtek RTL8195A是中国台湾瑞昱半导体（Realtek）公司的一款物联网微控制器。 Realtek RTL8195A 2.08之前版本存在缓冲区溢出漏洞，攻击者可利用该漏洞将精心设计的数据包注入WPA2握手来模拟接入点并攻击易受攻击的Wi-Fi客户端。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://www.amebaiot.com/en/ameba-arduino-getting-started/

Reference

https://nvd.nist.gov/vuln/detail/CVE-2020-25856

Impacted products

Name
Realtek RTL8195A <2.08

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2020-25856",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2020-25856"
    }
  },
  "description": "Realtek RTL8195A\u662f\u4e2d\u56fd\u53f0\u6e7e\u745e\u6631\u534a\u5bfc\u4f53\uff08Realtek\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7269\u8054\u7f51\u5fae\u63a7\u5236\u5668\u3002\n\nRealtek RTL8195A 2.08\u4e4b\u524d\u7248\u672c\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u6570\u636e\u5305\u6ce8\u5165WPA2\u63e1\u624b\u6765\u6a21\u62df\u63a5\u5165\u70b9\u5e76\u653b\u51fb\u6613\u53d7\u653b\u51fb\u7684Wi-Fi\u5ba2\u6237\u7aef\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://www.amebaiot.com/en/ameba-arduino-getting-started/",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-56815",
  "openTime": "2021-07-30",
  "patchDescription": "Realtek RTL8195A\u662f\u4e2d\u56fd\u53f0\u6e7e\u745e\u6631\u534a\u5bfc\u4f53\uff08Realtek\uff09\u516c\u53f8\u7684\u4e00\u6b3e\u7269\u8054\u7f51\u5fae\u63a7\u5236\u5668\u3002\r\n\r\nRealtek RTL8195A 2.08\u4e4b\u524d\u7248\u672c\u5b58\u5728\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5c06\u7cbe\u5fc3\u8bbe\u8ba1\u7684\u6570\u636e\u5305\u6ce8\u5165WPA2\u63e1\u624b\u6765\u6a21\u62df\u63a5\u5165\u70b9\u5e76\u653b\u51fb\u6613\u53d7\u653b\u51fb\u7684Wi-Fi\u5ba2\u6237\u7aef\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Realtek RTL8195A\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-56815\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Realtek RTL8195A \u003c2.08"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2020-25856",
  "serverity": "\u4e2d",
  "submitTime": "2021-02-05",
  "title": "Realtek RTL8195A\u7f13\u51b2\u533a\u6ea2\u51fa\u6f0f\u6d1e\uff08CNVD-2021-56815\uff09"
}

CVE-2020-25856 (GCVE-0-2020-25856)

Vulnerability from cvelistv5 – Published: 2021-02-03 16:49 – Updated: 2024-08-04 15:49

Summary

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 rtl_memcpy() operation, 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.

Severity ?

No CVSS data available.

CWE

CWE-121 - Stack buffer overflow (CWE-121)

Assigner

VDOO

References

URL

Tags

https://www.vdoo.com/blog/realtek-rtl8195a-vulner…

x_refsource_CONFIRM

Impacted products

	Vendor	Product	Version
	n/a	Realtek RTL8195A Wi-Fi Module	Affected: Versions before 2020-04-21 (up to and excluding 2.08)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T15:49:05.936Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Realtek RTL8195A Wi-Fi Module",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Versions before 2020-04-21 (up to and excluding 2.08)"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 rtl_memcpy() operation, 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\u0027s PSK in order to exploit this."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "Stack buffer overflow (CWE-121)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-02-03T16:49:02",
        "orgId": "6b4ace4a-d6e0-415b-9ce8-aa20e97e4b24",
        "shortName": "VDOO"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "vuln@vdoo.com",
          "ID": "CVE-2020-25856",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Realtek RTL8195A Wi-Fi Module",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "Versions before 2020-04-21 (up to and excluding 2.08)"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "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 rtl_memcpy() operation, 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\u0027s PSK in order to exploit this."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Stack buffer overflow (CWE-121)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/",
              "refsource": "CONFIRM",
              "url": "https://www.vdoo.com/blog/realtek-rtl8195a-vulnerabilities-discovered/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "6b4ace4a-d6e0-415b-9ce8-aa20e97e4b24",
    "assignerShortName": "VDOO",
    "cveId": "CVE-2020-25856",
    "datePublished": "2021-02-03T16:49:02",
    "dateReserved": "2020-09-23T00:00:00",
    "dateUpdated": "2024-08-04T15:49:05.936Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2021-56815

CVE-2020-25856 (GCVE-0-2020-25856)

Tags

Sightings

Nomenclature