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High severity · published Jan 25, 2022
CVE-2021-34865
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of multiple NETGEAR routers
8.8
CVSS
3.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.1% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AF
Ac2100 Firmware · Netgear
before 1.2.0.88 · source: NVD
AF
Ac2400 Firmware · Netgear
before 1.2.0.88 · source: NVD
AF
Ac2600 Firmware · Netgear
before 1.2.0.88 · source: NVD
DF
D7000v1 Firmware · Netgear
before 1.0.1.80 · source: NVD
RF
R6220 Firmware · Netgear
before 1.1.0.110 · source: NVD
RF
R6230 Firmware · Netgear
before 1.1.0.110 · source: NVD
RF
R6260 Firmware · Netgear
before 1.1.0.84 · source: NVD
RF
R6330 Firmware · Netgear
before 1.1.0.84 · source: NVD
RF
R6350 Firmware · Netgear
before 1.1.0.84 · source: NVD
RF
R6700v2 Firmware · Netgear
before 1.2.0.88 · source: NVD
RF
R6800 Firmware · Netgear
before 1.2.0.88 · source: NVD
RF
R6850 Firmware · Netgear
before 1.1.0.84 · source: NVD
Affected product
AF
Ac2100 Firmware
Netgear
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34865
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34865
Vendor Advisory
https://kb.netgear.com/000063955/Security-Advisory-for-Authentication-Bypass-Vulnerability-on-Some-Routers-PSV-2021-0083?article=000063955
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1051/
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