Critical severity · published Aug 16, 2021
CVE-2021-35393
Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols
9.8
CVSS
66.4%
EPSS
No
On KEV
Description
Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a stack buffer overflow vulnerability that is present due to unsafe parsing of the UPnP SUBSCRIBE/UNSUBSCRIBE Callback header. Successful exploitation of this vulnerability allows remote unauthenticated attackers to gain arbitrary code execution on the affected device.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)66.4% · higher than 99% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RJ
Rtl819x Jungle Software Development Kit · Realtek
2.0 through 3.4.14b · source: NVD
Affected product
RJ
Rtl819x Jungle Software Development Kit
Realtek
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-35393
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-35393
Broken Link
https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain
Broken Link
https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
Patch
https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
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