Remote Command Execution Vulnerability in DrayTek Vigor Devices
CVE-2020-15415

9.8CRITICAL

Key Information:

Vendor
Draytek
Status
Vigor3900 Firmware
Vendor
CVE Published:
30 June 2020

Badges

👾 Exploit Exists🟣 EPSS 91%🦅 CISA Reported

Summary

The DrayTek Vigor3900, Vigor2960, and Vigor300B devices prior to version 1.5.1 are susceptible to a remote command execution vulnerability. This issue occurs in the cgi-bin/mainfunction.cgi/cvmcfgupload functionality, where an attacker can exploit shell metacharacters in a filename when an improper content type, specifically text/x-python-script, is utilized. This vulnerability allows unauthorized individuals to execute arbitrary commands on the affected system, posing significant security risks.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

References

https://www.draytek.com/about/security-advisory
x_refsource_MISC
https://github.com/CLP-team/Vigor-Commond-Injection
x_refsource_MISC

EPSS Score

91% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.