Vulnerability Details : CVE-2021-34947
NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root.
. Was ZDI-CAN-13055.
Vulnerability category: Memory CorruptionExecute code
Products affected by CVE-2021-34947
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Exploit prediction scoring system (EPSS) score for CVE-2021-34947
0.10%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 25 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34947
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
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 | 2024-05-07 |
CWE ids for CVE-2021-34947
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The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: zdi-disclosures@trendmicro.com (Secondary)
References for CVE-2021-34947
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https://www.zerodayinitiative.com/advisories/ZDI-21-1116/
ZDI-21-1116 | Zero Day Initiative
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https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129
Security Advisory for Pre-Authentication Buffer Overflow on Multiple Products, PSV-2021-0129 - NETGEAR Support
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