Vulnerability 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 Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Realtek | Rtl819X Jungle Software Development Kit | >= 2.0, <= 3.4.14b |
Related Weaknesses (CWE)
References
- https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-suppBroken LinkExploitThird Party Advisory
- https://www.realtek.com/en/cu-1-en/cu-1-taiwan-enBroken LinkPatchVendor Advisory
- https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-202PatchVendor Advisory
- https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-suppBroken LinkExploitThird Party Advisory
- https://www.realtek.com/en/cu-1-en/cu-1-taiwan-enBroken LinkPatchVendor Advisory
- https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-202PatchVendor Advisory
FAQ
What is CVE-2021-35393?
CVE-2021-35393 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 ...
How severe is CVE-2021-35393?
CVE-2021-35393 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-35393?
Check the references section above for vendor advisories and patch information. Affected products include: Realtek Rtl819X Jungle Software Development Kit.