CVE-2018-19991

VeryNginx 0.3.3 allows remote attackers to bypass the Web Application Firewall feature because there is no error handler (for get_uri_args or get_post_args) to…

published December 10, 2018

CVSS
—
EPSS
2%
Percentile
83.4
In the wild
Unconfirmed
What it is

⚠️ A missing error handler in VeryNginx 0.3.3 opens the door for attackers to bypass the Web Application Firewall! Think of it like a restaurant without a check-in system for kitchen orders — any miscommunication could let a rogue chef whip up a dangerous dish without oversight! An attacker could exploit this oversight to manipulate API requests, potentially leading to unauthorized access or data exposure. While it’s not the most alarming breach, it's still a sneaky way to undermine your defenses and put sensitive information at risk.

Put simply

Think of it like a restaurant without a check-in system for kitchen orders — any miscommunication could let a rogue chef whip up a dangerous dish without oversight! The vulnerability arises because the error handler for functions handling API arguments is absent, allowing misuse that circumvents the Web Application Firewall designed to protect the application. This issue connects to a previously documented flaw (CVE-2018-9230).

What to do

An attacker could exploit this oversight to manipulate API requests, potentially leading to unauthorized access or data exposure. While it’s not the most alarming breach, it's still a sneaky way to undermine your defenses and put sensitive information at risk. To safeguard your system, consider upgrading to the latest version of VeryNginx that addresses this vulnerability. Additionally, implement an error handling mechanism for API requests to ensure misuses are caught before they escalate. Regularly audit your web application settings for any overlooked security measures. You’ve got this! With a few simple steps, you can fortify your defenses and keep the bad guys at bay. 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.02326 · 83.4th percentile
Published
2018-12-10T00:00Z
EPSS history
Timeline
  • 10 DEC 00:00Z
    VeryNginx 0.3.3 allows remote attackers to bypass the Web Application Firewall feature because there is no error handler (for get_uri_args or get_post_args) to…
    cvelistv5