CVE-2021-37789

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Last Modified: UTC

Description

A flaw was found in stb_image. This issue occurs while processing the frame header information when the plane sampling configurations are calculated in two different ways, generating different results due to integer approximation. The value is further used to access several buffers, leading to a heap based out-of-bound read. This causes a heap data leak or an application crash, resulting in a denial of service.

A flaw was found in stb_image. This issue occurs while processing the frame header information when the plane sampling configurations are calculated in two different ways, generating different results due to integer approximation. The value is further used to access several buffers, leading to a heap based out-of-bound read. This causes a heap data leak or an application crash, resulting in a denial of service.

Statement

Although the NVD CVSSv3.1 scoring point to a 8.1, Red Hat considers the impact to be Moderate as this flaw can not be used to perform arbitrary code execution, needs local access to be exploited, and the amount of leaked information is constrained to a few bytes within the process heap.

Although the NVD CVSSv3.1 scoring point to a 8.1, Red Hat considers the impact to be Moderate as this flaw can not be used to perform arbitrary code execution, needs local access to be exploited, and the amount of leaked information is constrained to a few bytes within the process heap.

Additional information

  • Bugzilla 2141433: stb_image: heap-based buffer overflow
  • CWE-125: Out-of-bounds Read
  • FAQ: Frequently asked questions about CVE-2021-37789

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

8.1

8.1

Attack Vector

Network

Network

Attack Complexity

Low

Low

Privileges Required

None

None

User Interaction

Required

Required

Scope

Unchanged

Unchanged

Confidentiality Impact

High

High

Integrity Impact

None

None

Availability Impact

High

High

CVSS v3 Vector

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

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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?

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