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CVE-2021-33193 Affecting httpd:2.4/mod_md package, versions <1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa

Severity

 Recommended
medium

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    0.13% (48th percentile)

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  • Snyk ID SNYK-ALMALINUX8-HTTPD-5625483
  • published 28 May 2023
  • disclosed 10 May 2022
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Introduced: 10 May 2022

CVE-2021-33193 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:8 httpd:2.4/mod_md to version 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa or higher.
This issue was patched in ALSA-2022:1915.

NVD Description

Note: Versions mentioned in the description apply only to the upstream httpd:2.4/mod_md package and not the httpd:2.4/mod_md package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48.

References

CVSS Scores

version 3.1
Expand this section

NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    None
Expand this section

SUSE

9.1 critical
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Red Hat

7.5 high