Buffer overflow in NETGEAR R7000
CVE-2021-31802
NETGEAR R7000 1.0.11.116 devices have a heap-based Buffer Overflow that is exploitable from the local network without authentication. The vulnerability exists within the handling of an HTTP request. An attacker can leverage this to execute code as root. The problem is that a user-provided length value is trusted during a backup.cgi file upload. The attacker must add a \n before the Content-Length header.
Vulnerability class: Buffer Overflow
EPSS: 0.142 (96.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Netgear R7000
- Netgear R7000_firmware
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-31802?
- CVE-2021-31802 is a high-severity vulnerability in NETGEAR R7000, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2021-04-26.
- How severe is CVE-2021-31802?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-31802 known to be exploited?
- 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.