CVE-2021-43118

A Remote Command Injection vulnerability exists in DrayTek Vigor 2960 1.5.1.3, DrayTek Vigor 3900 1.5.1.3, and DrayTek Vigor 300B 1.5.1.3 via a crafted HTTP…

published March 29, 2022

CVSS
—
EPSS
35%
Percentile
98.4
In the wild
Unconfirmed
What it is

⚠️ A rogue HTTP message could unlock an all-access pass! The DrayTek Vigor 2960, 3900, and 300B are vulnerable to remote command injection in version 1.5.1.3. 🔥 Think of it like an unnoticed backdoor in a hotel that lets anyone with the right knock get inside and do whatever they want – even rearranging the furniture or changing the locks! If exploited, a crafty attacker could remotely execute arbitrary code, giving them control over the device. This could lead to massive disruptions or unauthorized access to sensitive data, turning your network into a playground for malicious deeds. 😱

Put simply

Think of it like an unnoticed backdoor in a hotel that lets anyone with the right knock get inside and do whatever they want – even rearranging the furniture or changing the locks! This vulnerability arises from a malformed QUERY STRING in the mainfunction.cgi script, allowing remote users to inject and execute commands as if they were the system itself. It's a dangerous oversight in how input is processed!

What to do

If exploited, a crafty attacker could remotely execute arbitrary code, giving them control over the device. This could lead to massive disruptions or unauthorized access to sensitive data, turning your network into a playground for malicious deeds. 😱 Act quickly to patch devices to version 1.5.1.4 or later. Review your network configurations and restrict access to the administrative interfaces to trusted IPs only. Regularly audit your devices for any signs of unusual activity! You’ve got this! With the right steps, you can secure your network and keep those backdoors locked tight! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.34845 · 98.4th percentile
Published
2022-03-29T19:37Z
EPSS history
Timeline
  • 29 MAR 19:37Z
    A Remote Command Injection vulnerability exists in DrayTek Vigor 2960 1.5.1.3, DrayTek Vigor 3900 1.5.1.3, and DrayTek Vigor 300B 1.5.1.3 via a crafted HTTP…
    cvelistv5