Vulnerability Details : CVE-2021-4242
Potential exploit
A vulnerability was found in Sapido BR270n, BRC76n, GR297 and RB1732 and classified as critical. Affected by this issue is some unknown functionality of the file ip/syscmd.htm. The manipulation leads to os command injection. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The identifier of this vulnerability is VDB-214592.
Products affected by CVE-2021-4242
- cpe:2.3:o:sapido:gr297n_firmware:2.1.3:*:*:*:*:*:*:*
- cpe:2.3:o:sapido:br270n_firmware:2.1.03:*:*:*:*:*:*:*
- cpe:2.3:o:sapido:brc76n_firmware:2.1.03:*:*:*:*:*:*:*
- cpe:2.3:o:sapido:rb-1732_firmware:2.0.43:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4242
0.97%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 75 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4242
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.3
|
MEDIUM | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L |
2.8
|
3.4
|
VulDB | |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-4242
-
The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.Assigned by: cna@vuldb.com (Secondary)
-
The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.Assigned by:
- cna@vuldb.com (Secondary)
- nvd@nist.gov (Primary)
-
The product does not ensure or incorrectly ensures that structured messages or data are well-formed and that certain security properties are met before being read from an upstream component or sent to a downstream component.Assigned by: cna@vuldb.com (Secondary)
References for CVE-2021-4242
-
https://vuldb.com/?id.214592
CVE-2021-4242 | Sapido BR270n/BRC76n/GR297/RB1732 syscmd.htm os command injectionThird Party Advisory
-
https://github.com/smallpiggy/Sapido--rce/blob/main/Sapido%E8%B7%AF%E7%94%B1%E5%99%A8-rce.py
Sapido--rce/Sapido路由器-rce.py at main · smallpiggy/Sapido--rce · GitHubExploit;Third Party Advisory
-
https://blog.csdn.net/qq_44159028/article/details/114590267
Sapido多款路由器命令执行漏洞_山山而川'的博客-CSDN博客Exploit;Third Party Advisory
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