Vulnerability Details : CVE-2021-34865
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root. Was ZDI-CAN-13313.
Vulnerability category: Execute codeBypassGain privilege
Products affected by CVE-2021-34865
- cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6700v2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6900v2_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:d7000v1_firmware:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34865
0.34%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 72 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34865
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:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
Zero Day Initiative | |
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-2021-34865
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: zdi-disclosures@trendmicro.com (Secondary)
-
The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-34865
-
https://www.zerodayinitiative.com/advisories/ZDI-21-1051/
ZDI-21-1051 | Zero Day InitiativeThird Party Advisory;VDB Entry
-
https://kb.netgear.com/000063955/Security-Advisory-for-Authentication-Bypass-Vulnerability-on-Some-Routers-PSV-2021-0083?article=000063955
Security Advisory for Authentication Bypass Vulnerability on Some Routers, PSV-2021-0083 | Answer | NETGEAR SupportVendor Advisory
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