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CVE-2021-47854— DD-WRT 45723 - UPNP Buffer Overflow

Quick assessment

Affected
embeDD GmbH DD-WRT
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

DD-WRT是DD-WRT开源的一种基于 Linux 的替代开源固件。适用于各种 WLAN 路由器和嵌入式系统。 DD-WRT 45723版本存在安全漏洞，该漏洞源于UPNP网络发现服务存在缓冲区溢出，可能导致执行任意代码。

CVSS 9.8 · Critical EPSS 1.01% · P61

Affected Version Matrix 1

VendorProduct Version RangeStatus
embeDD GmbH DD-WRT 45723 affected
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I. Basic Information for CVE-2021-47854

Vulnerability Information
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Vulnerability Title
DD-WRT 45723 - UPNP Buffer Overflow
Source: CVE Program / CVE List V5
Vulnerability Description
DD-WRT version 45723 contains a buffer overflow vulnerability in the UPNP network discovery service that allows remote attackers to potentially execute arbitrary code. Attackers can send crafted M-SEARCH packets with oversized UUID payloads to trigger buffer overflow conditions on the target device.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
DD-WRT 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
DD-WRT是DD-WRT开源的一种基于 Linux 的替代开源固件。适用于各种 WLAN 路由器和嵌入式系统。 DD-WRT 45723版本存在安全漏洞，该漏洞源于UPNP网络发现服务存在缓冲区溢出，可能导致执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
embeDD GmbH DD-WRT 45723 -

II. Public POCs for CVE-2021-47854

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III. Intelligence Information for CVE-2021-47854

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Vendor Advisories for CVE-2021-47854 (1)

IV. Related Vulnerabilities

Same product: DD-WRT
Same weakness: CWE-120

V. Comments for CVE-2021-47854

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