Vulnerability Details : CVE-2020-27866
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 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 in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.
Vulnerability category: Execute codeBypassGain privilege
Products affected by CVE-2020-27866
- cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:*
- cpe:2.3:o:netgear:r6120_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:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-27866
0.42%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 75 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-27866
| 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-2020-27866
-
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.Assigned by: nvd@nist.gov (Secondary)
-
The product requires authentication, but the product has an alternate path or channel that does not require authentication.Assigned by: zdi-disclosures@trendmicro.com (Primary)
References for CVE-2020-27866
-
https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
ZDI-20-1451 | Zero Day InitiativeThird Party Advisory;VDB Entry
-
https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
Security Advisory for Password Recovery Vulnerabilities on Some Routers | Answer | NETGEAR SupportVendor Advisory
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