Heap-Based Buffer Overflow in NETGEAR R7000 Network Devices
CVE-2021-31802

8.8HIGH

Key Information:

Vendor

Netgear
Status
R7000 Firmware
Vendor
CVE Published:
26 April 2021

What is CVE-2021-31802?

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.

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References

https://www.netgear.com/about/security/
x_refsource_MISC
https://ssd-disclosure.com/ssd-advisory-netgear-nighthawk...
x_refsource_MISC

EPSS Score

18% 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

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