VulnerabilityModified
CVE-2021-27705
Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request.
CRITICAL 9.8EPSS 2.94%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.94%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.94% probability · 86th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-120
- Affected
- tenda/g1 firmware · tenda/g3 firmware
- Source
- cve@mitre.org
References
- https://hackmd.io/Zb7lfFaNR0ScpaTssECFbgExploit, Third Party Advisory
- https://hackmd.io/Zb7lfFaNR0ScpaTssECFbgExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.