Vulnerability Details : CVE-2021-34983
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.
Vulnerability category: Information leak
Products affected by CVE-2021-34983
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Exploit prediction scoring system (EPSS) score for CVE-2021-34983
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 10 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34983
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.5
|
MEDIUM | CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
2.8
|
3.6
|
Zero Day Initiative | 2024-05-08 |
CWE ids for CVE-2021-34983
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The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
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The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.Assigned by: zdi-disclosures@trendmicro.com (Secondary)
References for CVE-2021-34983
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https://kb.netgear.com/000064313/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Extenders-Routers-and-DSL-Modem-Routers-PSV-2021-0159
Security Advisory for Pre-Authentication Buffer Overflow on Some Extenders, Routers, and DSL Modem Routers, PSV-2021-0159 - NETGEAR Support
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https://www.zerodayinitiative.com/advisories/ZDI-21-1275/
ZDI-21-1275 | Zero Day Initiative
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