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. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.

CVSS v3.1

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

2.94% chance of exploitation in the next 30 days, 86th percentile

Published

2021-04-14

Updated

2024-08-03

Proof-of-concept exploits (1)

• https://hackmd.io/Zb7lfFaNR0ScpaTssECFbg

References

• CVE Record
• NVD entry

Related

• CVE-2021-27695
• CVE-2021-27706
• CVE-2021-27673
• CVE-2021-27707
• CVE-2021-27672
• CVE-2021-27708