PT-2022-12495 · Tenda · Tenda Routers G3+1

Published 2022-02-04 · Updated 2022-02-08 · CVE-2021-45996

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Tenda routers G1 and G3 version 15.11.0.17(9502) CN

Description A stack overflow was discovered in the formSetPortMapping function, allowing attackers to cause a Denial of Service (DoS) via the portMappingServer, portMappingProtocol, portMappingWan, portMappingInternal, and portMappingExternal parameters.

Recommendations For Tenda routers G1 and G3 version 15.11.0.17(9502) CN, as a temporary workaround, consider disabling the formSetPortMapping function until a patch is available. Restrict access to the parameters portMappingServer, portMappingProtocol, portMappingWan, portMappingInternal, and portMappingExternal to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

CVE-2021-45996

Affected Products

Tenda Routers G1

Tenda Routers G3

References · 3

• 🔥❌ https://github.com/pjqwudi/my_vuln/tree/main/Tenda/vuln_8 · Exploit, Deleted
• https://osv.dev/vulnerability/CVE-2021-45996 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-45996 · Security Note