Heap-Based Buffer Overflow in NETGEAR R7000 Network Devices
CVE-2021-31802
8.8HIGH
Summary
A vulnerability in NETGEAR R7000 routers allows for a heap-based buffer overflow through unauthenticated HTTP requests. This occurs during the upload process of the backup.cgi file when user-provided length values are wrongly trusted, leading to the potential execution of arbitrary code with root privileges. Attackers need to craft specific HTTP requests that include a newline character before the Content-Length header to exploit this flaw, making it crucial for users to implement security measures promptly.
References
EPSS Score
11% chance of being exploited in the next 30 days.
CVSS V3.1
Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged
Timeline
Vulnerability published
Vulnerability Reserved