CVE-2021-35395 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03
The Realtek Jungle SDK HTTP web server (both 'webs' and 'boa' implementations) contains multiple stack buffer overflows and command injection vulnerabilities. These flaws arise from unsafe handling of parameters such as submit-url, ifname, hostname, and peerPin, allowing remote attackers to achieve arbitrary code execution or denial-of-service.
Yes. CVE-2021-35395 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2021-35395?
Critical severity, with a CVSS score of 9.8, published 3 November 2021.
Which products and versions are affected?
Realtek Jungle SDK v2.x up to v3.4.14B; Realtek RTL819x Jungle SDK v2.x up to v3.4.14B.
Is there a fix for CVE-2021-35395?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2021-35395 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2021-35395?
Check whether you run Realtek Ap-Router Sdk. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Affected products
Realtek Jungle SDK v2.x up to v3.4.14B
Realtek RTL819x Jungle SDK v2.x up to v3.4.14B
Timeline
2021-11-03: disclosed
2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
2021-11-03: exploited: Reported as exploited in the wild at time of publication.