Executive Summary



This Alert is flagged as TOP 25 Common Weakness Enumeration from CWE/SANS. For more information, you can read this.
Informations
Name CVE-2021-32785 First vendor Publication 2021-07-22
Vendor Cve Last vendor Modification 2021-10-18

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 7.5
Base Score 7.5 Environmental Score 7.5
impact SubScore 3.6 Temporal Score 7.5
Exploitabality Sub Score 3.9
 
Attack Vector Network Attack Complexity Low
Privileges Required None User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:N/I:N/A:P)
Cvss Base Score 4.3 Attack Range Network
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. When mod_auth_openidc versions prior to 2.4.9 are configured to use an unencrypted Redis cache (`OIDCCacheEncrypt off`, `OIDCSessionType server-cache`, `OIDCCacheType redis`), `mod_auth_openidc` wrongly performed argument interpolation before passing Redis requests to `hiredis`, which would perform it again and lead to an uncontrolled format string bug. Initial assessment shows that this bug does not appear to allow gaining arbitrary code execution, but can reliably provoke a denial of service by repeatedly crashing the Apache workers. This bug has been corrected in version 2.4.9 by performing argument interpolation only once, using the `hiredis` API. As a workaround, this vulnerability can be mitigated by setting `OIDCCacheEncrypt` to `on`, as cache keys are cryptographically hashed before use when this option is enabled.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-32785

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-134 Uncontrolled Format String (CWE/SANS Top 25)

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 249
Application 1

Sources (Detail)

Source Url
CONFIRM https://github.com/zmartzone/mod_auth_openidc/security/advisories/GHSA-55r8-6...
https://security.netapp.com/advisory/ntap-20210902-0001/
MISC https://github.com/zmartzone/mod_auth_openidc/commit/dc672688dc1f2db7df8ad4ab...
https://github.com/zmartzone/mod_auth_openidc/releases/tag/v2.4.9

Alert History

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Date Informations
2021-10-18 17:23:05
  • Multiple Updates
2021-09-02 13:23:00
  • Multiple Updates
2021-08-04 21:23:14
  • Multiple Updates
2021-07-23 21:23:11
  • Multiple Updates
2021-07-23 05:22:47
  • First insertion