Vulnerability Details : CVE-2021-31802

Public exploit exists!
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.
Published 2021-04-26 13:15:08
Updated 2021-05-06 20:38:27
Source MITRE
View at NVD,   CVE.org
Vulnerability category: OverflowMemory CorruptionExecute code

Products affected by CVE-2021-31802

Exploit prediction scoring system (EPSS) score for CVE-2021-31802

EPSS FAQ
4.25%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 92 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2021-31802

  • Netgear R7000 backup.cgi Heap Overflow RCE
    Disclosure Date: 2021-04-21
    First seen: 2022-12-23
    auxiliary/admin/http/netgear_r7000_backup_cgi_heap_overflow_rce
    This module exploits a heap buffer overflow in the genie.cgi?backup.cgi page of Netgear R7000 routers running firmware version 1.0.11.116. Successful exploitation results in unauthenticated attackers gaining code execution as the root user. The exp

CVSS scores for CVE-2021-31802

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
8.3
 HIGH AV:A/AC:L/Au:N/C:C/I:C/A:C
6.5
10.0
 NIST
8.8
 HIGH CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.8
5.9
 NIST

CWE ids for CVE-2021-31802

  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-31802

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