CVE-2021-33193

Advisory lineage Upstream: 0 Downstream: 14
Analyzed
Published: 16 Aug 2021, 00:00
Last modified:03 Aug 2024, 23:42

Vulnerability Summary

Overall Risk (default)
medium
40/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
0.61% LOW
1% probability -0.52%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

16 Aug 2021, 00:00
Published
Vulnerability first disclosed
03 Aug 2024, 23:42
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:P/A:N

EPSS Trends

Current EPSS score: 0.61%• Percentile: 70%

Affected Systems

  • apache software foundation•apache http server

    Apache HTTP Server 2.4 2.4.17 to 2.4.48

  • Unknown•HTTP Server

    ≥ 2.4.17, < 2.4.49

  • debian•debian_linux

    10.0

  • fedoraproject•fedora

    34 | 35

  • oracle•secure_backup

    < 18.1.0.1.0

  • oracle•zfs_storage_appliance_kit

    8.8

  • tenable•tenable.sc

    ≤ 5.19.1

References (13)