CVE-2020-5756 — HIGH (8.8) — White Hats Nepal

Q: How severe is CVE-2020-5756?

CVE-2020-5756 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2020-5756?

Check the references section above for vendor advisories and patch information. Affected products include: Grandstream Gwn7000 Firmware, Grandstream Gwn7000.

Vulnerability Description

Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Grandstream	Gwn7000 Firmware	<= 1.0.9.4
Grandstream	Gwn7000	-

Related Weaknesses (CWE)

CWE-489 CWE-78

References

https://www.tenable.com/security/research/tra-2020-41Not Applicable
https://www.tenable.com/cve/CVE-2020-5756ExploitThird Party Advisory
https://www.tenable.com/security/research/tra-2020-41Not Applicable

FAQ

What is CVE-2020-5756?

CVE-2020-5756 is a vulnerability with a CVSS score of 8.8 (HIGH). Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrar...

How severe is CVE-2020-5756?

CVE-2020-5756 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-5756?

Check the references section above for vendor advisories and patch information. Affected products include: Grandstream Gwn7000 Firmware, Grandstream Gwn7000.