CVE-2019-14492

Public on

Last Modified: UTC

Description

An out-of-bounds read flaw was found in OpenCV in the way the Cascade Classifier algorithm loaded and processed the Haar feature-based cascade classifiers. This flaw allows a remote attacker to provide a specially crafted classifier in the form of an XML file that, when loaded by an application linked to OpenCV, would crash the application, causing a denial of service.

An out-of-bounds read flaw was found in OpenCV in the way the Cascade Classifier algorithm loaded and processed the Haar feature-based cascade classifiers. This flaw allows a remote attacker to provide a specially crafted classifier in the form of an XML file that, when loaded by an application linked to OpenCV, would crash the application, causing a denial of service.

Statement

The versions of OpenCV as shipped with Red Hat Enterprise Linux 7 and 8 are affected by this flaw. Although it's technically possible that classifiers are loaded from untrusted sources, this is probably an unlikely case in practice.

The versions of OpenCV as shipped with Red Hat Enterprise Linux 7 and 8 are affected by this flaw. Although it's technically possible that classifiers are loaded from untrusted sources, this is probably an unlikely case in practice.

Mitigation

Avoid loading cascade classifiers from external untrusted sources.

Additional information

  • Bugzilla 1797445: opencv: out-of-bounds read in function HaarEvaluator::OptFeature::calc() in cascadedetect.hpp leading to DoS
  • CWE-125->CWE-400: Out-of-bounds Read leads to Uncontrolled Resource Consumption
  • FAQ: Frequently asked questions about CVE-2019-14492

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown
Red HatNVD

CVSS v3 Base Score

7.5

7.5

Attack Vector

Network

Network

Attack Complexity

Low

Low

Privileges Required

None

None

User Interaction

None

None

Scope

Unchanged

Unchanged

Confidentiality Impact

None

None

Integrity Impact

None

None

Availability Impact

High

High

CVSS v3 Vector

Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

My product is listed as "Out of Support Scope". What does this mean?

Want to get errata notifications? Sign up here.