Medium severity · published May 7, 2024
CVE-2021-34983
NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
NETGEAR Multiple Routers httpd Missing Authentication for Critical Function Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of multiple NETGEAR routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the httpd service, which listens on TCP port 80 by default. The issue results from the lack of authentication prior to allowing access to system configuration information. An attacker can leverage this vulnerability to disclose stored credentials, leading to further compromise. Was ZDI-CAN-13708.
CVSS vector
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 26% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MR
Multiple Routers · NETGEAR
V1.0.11.116_10.2.100 · source: vendor
DF
D6220 Firmware · Netgear
before 1.0.0.76 · source: NVD
DF
D6400 Firmware · Netgear
before 1.0.0.108 · source: NVD
DF
D7000v2 Firmware · Netgear
before 1.0.0.76 · source: NVD
DF
Dc112a Firmware · Netgear
before 1.0.0.62 · source: NVD
DF
Dgn2200v4 Firmware · Netgear
before 1.0.0.126 · source: NVD
EF
Ex3700 Firmware · Netgear
before 1.0.0.94 · source: NVD
EF
Ex3800 Firmware · Netgear
before 1.0.0.94 · source: NVD
EF
Ex6120 Firmware · Netgear
before 1.0.0.66 · source: NVD
EF
Ex6130 Firmware · Netgear
before 1.0.0.46 · source: NVD
EF
Ex7000 Firmware · Netgear
before 1.0.1.106 · source: NVD
EF
Ex7500 Firmware · Netgear
before 1.0.1.76 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34983
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34983
Vendor Advisory
https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-1275/
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