9.8
CRITICAL
CVE-2020-14993
DrayTek Vigor2960, Vigor3900, and Vigor300B Remote Stack-Based Buffer Overflow
Description

A stack-based buffer overflow on DrayTek Vigor2960, Vigor3900, and Vigor300B devices before 1.5.1.1 allows remote attackers to execute arbitrary code via the formuserphonenumber parameter in an authusersms action to mainfunction.cgi.

INFO

Published Date :

June 23, 2020, 12:15 p.m.

Last Modified :

Nov. 21, 2024, 5:04 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2020-14993 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2020-14993 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Draytek vigor2960_firmware
2 Draytek vigor300b_firmware
3 Draytek vigor3900_firmware
4 Draytek vigor2960
5 Draytek vigor300b
6 Draytek vigor3900

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

poc of ImageMagick hangs

Updated: 2 years, 6 months ago
2 stars 2 fork 2 watcher
Born at : April 9, 2020, 3:39 a.m. This repo has been linked 9 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-14993 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-14993 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://github.com/dexterone/Vigor-poc
    Added Reference https://www.draytek.com/about/security-advisory
    Added Reference https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Nov. 07, 2023

    Action Type Old Value New Value
    Added Reference MITRE https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-%28cve-2020-14473%29 [No types assigned]
    Removed Reference MITRE https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-(cve-2020-14473)
  • Initial Analysis by [email protected]

    Jun. 29, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:P/I:P/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type https://github.com/dexterone/Vigor-poc No Types Assigned https://github.com/dexterone/Vigor-poc Exploit, Third Party Advisory
    Changed Reference Type https://www.draytek.com/about/security-advisory No Types Assigned https://www.draytek.com/about/security-advisory Vendor Advisory
    Changed Reference Type https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-(cve-2020-14473) No Types Assigned https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-(cve-2020-14473) Patch, Vendor Advisory
    Added CWE NIST CWE-787
    Added CPE Configuration AND OR *cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.5.1.1 OR cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.5.1.1 OR cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:* versions up to (excluding) 1.5.1.1 OR cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Jun. 24, 2020

    Action Type Old Value New Value
    Added Reference https://www.draytek.com/about/security-advisory/vigor3900-/-vigor2960-/-vigor300b-stack-based-buffer-overflow-vulnerability-(cve-2020-14473) [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-14993 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-14993 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

3.70 }} -6.80%

score

0.91638

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability