Stack-based Buffer Overflow in DrayTek Vigor Series
CVE-2020-14993

9.8CRITICAL

Key Information:

Vendor

Draytek
Status
Vigor300b Firmware
Vendor
CVE Published:
23 June 2020

What is CVE-2020-14993?

A stack-based buffer overflow vulnerability exists on DrayTek Vigor2960, Vigor3900, and Vigor300B devices prior to version 1.5.1.1. This security flaw allows remote attackers to exploit the formuserphonenumber parameter in an authusersms action via mainfunction.cgi, potentially leading to the execution of arbitrary code. Proper updates and security patches are recommended to mitigate this vulnerability.

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References

https://github.com/dexterone/Vigor-poc
x_refsource_MISC
https://www.draytek.com/about/security-advisory
x_refsource_MISC
https://www.draytek.com/about/security-advisory/vigor3900...
x_refsource_CONFIRM

EPSS Score

11% 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

  • Vulnerability published

  • Vulnerability Reserved

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