Vulnerability Details : CVE-2021-34978
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6260 1.1.0.78_1.0.1 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the setupwizard.cgi page. A crafted SOAP request can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13511.
Vulnerability category: Memory CorruptionExecute code
Products affected by CVE-2021-34978
- cpe:2.3:o:netgear:r6260_firmware:1.1.0.78_1.0.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-34978
0.74%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 71 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-34978
| 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-2021-34978
-
A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).Assigned by: zdi-disclosures@trendmicro.com (Secondary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-34978
-
https://kb.netgear.com/000064258/Security-Advisory-for-Vertical-Privilege-Escalation-on-Some-Routers-DSL-Modem-Routers-and-Access-Points-PSV-2021-0151-and-PSV-2021-0170?article=000064258
Security Advisory for Vertical Privilege Escalation on Some Routers, DSL Modem Routers, and Access Points, PSV-2021-0151 and PSV-2021-0170 | Answer | NETGEAR SupportVendor Advisory
-
https://www.zerodayinitiative.com/advisories/ZDI-21-1240/
ZDI-21-1240 | Zero Day InitiativeThird Party Advisory;VDB Entry
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