CVE-2021-32785

Description

A flaw was found in mod_auth_openidc. When mod_auth_openidc is configured to use unencrypted Redis cache it is possible to trigger a format string bug that could be used by a remote unauthenticated attacker to crash the httpd workers. The highest threat from this liability is to service availability.

Statement

This issue did not affect the versions of mod_auth_openidc as shipped with Red Hat Enterprise Linux 7, and 8 as they did not include support for Redis cache.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert: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 HatNVDcve.org
Base Score7.57.5N/A
Attack VectorNetworkNetworkN/A
Attack ComplexityLowLowN/A
Privileges RequiredNoneNoneN/A
User InteractionNoneNoneN/A
ScopeUnchangedUnchangedN/A
ConfidentialityNoneNoneN/A
Integrity ImpactNoneNoneN/A
Availability ImpactHighHighN/A

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

Understanding the Weakness (CWE)

CWE-134

Confidentiality

Technical Impact: Read Memory

Format string problems allow for information disclosure which can severely simplify exploitation of the program.

Integrity,Confidentiality,Availability

Technical Impact: Modify Memory; Execute Unauthorized Code or Commands

Format string problems can result in the execution of arbitrary code, buffer overflows, denial of service, or incorrect data representation.

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