CVE-2022-23943
CriticalOut-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data.
Published Mar 16, 2022 · Updated Sep 8, 2026 · Also known as ALPINE-CVE-2022-23943, BIT-apache-2022-23943, DEBIAN-CVE-2022-23943, UBUNTU-CVE-2022-23943
Key Facts
Patch immediately- CVE-2022-23943 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting HTTP Server (Apache), Zfs Storage Appliance Kit (Oracle), Debian Linux and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 50% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache 2.4.53, HTTP Server 2.4.53, apache2 2.4.18-2ubuntu3.17+esm5.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
50%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2022-23943 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue affects Apache HTTP Server 2.4 version 2.4.52 and prior versions.
Affected Products
431 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| HTTP ServerApache | 12.2.1.3.0, 12.2.1.4.0, >= 2.4 | 2.4.53 |
| Zfs Storage Appliance KitOracle | 8.8 | n/a |
| Debian LinuxDebian | 9.0 | n/a |
| FedoraFedoraproject | 34, 35, 36 | n/a |
| apache2alpine | See advisory | 2.4.53-r0 |
Patched Releases
apache
2.4.53
HTTP Server
2.4.53
apache2
2.4.18-2ubuntu3.17+esm5, 2.4.23-29.88.1, 2.4.25-3+deb9u13, 2.4.29-1ubuntu4.22, 2.4.33-150000.3.66.1, 2.4.41-4ubuntu3.10, 2.4.51-150200.3.42.1, 2.4.51-35.13.1, 2.4.52-1ubuntu2, 2.4.53-1, 2.4.53-1.1, 2.4.53-1~deb11u1, 2.4.53-r0, 2.4.66-150400.6.57.1, 2.4.7-1ubuntu4.22+esm4
apache2-devel
2.4.33-150000.3.66.1, 2.4.51-150200.3.42.1, 2.4.51-35.13.1, 2.4.66-150400.6.57.1
apache2-doc
2.4.23-29.88.1, 2.4.33-150000.3.66.1, 2.4.51-150200.3.42.1, 2.4.51-35.13.1, 2.4.66-150400.6.57.1
apache2-event
2.4.51-150200.3.42.1
apache2-example-pages
2.4.23-29.88.1, 2.4.51-150200.3.42.1, 2.4.51-35.13.1
apache2-prefork
2.4.23-29.88.1, 2.4.33-150000.3.66.1, 2.4.51-150200.3.42.1, 2.4.51-35.13.1, 2.4.66-150400.6.57.1
apache2-utils
2.4.23-29.88.1, 2.4.33-150000.3.66.1, 2.4.51-150200.3.42.1, 2.4.51-35.13.1, 2.4.66-150400.6.57.1
apache2-worker
2.4.23-29.88.1, 2.4.33-150000.3.66.1, 2.4.51-150200.3.42.1, 2.4.51-35.13.1, 2.4.66-150400.6.57.1
httpd
0:2.4.53-7.el9, 2.4.37-51.0.1.module+el8.7.0+20778+02173b8e, 2.4.37-51.module_el8.7.0+3281+01e58653, 2.4.37-51.module+el8.7.0+1059+126e9251, 2.4.53-1, 2.4.53-1.amzn2, 2.4.53-1.ph1, 2.4.53-1.ph2, 2.4.53-1.ph3, 2.4.53-1.ph4, 2.4.53-3.amzn2022.0.1, 2.4.53-7.0.1.el9, 2.4.53-7.el9, 2.4.54-3.amzn2022.0.3, 2.4.54-3.amzn2023.0.4
httpd-core
2.4.53-3.amzn2022.0.1, 2.4.53-7.0.1.el9, 2.4.54-3.amzn2022.0.3, 2.4.54-3.amzn2023.0.4
httpd-devel
2.4.37-51.0.1.module+el8.7.0+20778+02173b8e, 2.4.53-1.amzn2, 2.4.53-1.ph4, 2.4.53-3.amzn2022.0.1, 2.4.53-7.0.1.el9, 2.4.54-3.amzn2022.0.3, 2.4.54-3.amzn2023.0.4
httpd-docs
2.4.53-1.ph4
httpd-filesystem
2.4.37-51.0.1.module+el8.7.0+20778+02173b8e, 2.4.53-1.amzn2, 2.4.53-3.amzn2022.0.1, 2.4.53-7.0.1.el9, 2.4.54-3.amzn2022.0.3, 2.4.54-3.amzn2023.0.4
httpd-manual
2.4.37-51.0.1.module+el8.7.0+20778+02173b8e, 2.4.53-1.amzn2, 2.4.53-3.amzn2022.0.1, 2.4.53-7.0.1.el9, 2.4.54-3.amzn2022.0.3, 2.4.54-3.amzn2023.0.4
httpd-tools
2.4.37-51.0.1.module+el8.7.0+20778+02173b8e, 2.4.53-1.amzn2, 2.4.53-1.ph4, 2.4.53-3.amzn2022.0.1, 2.4.53-7.0.1.el9, 2.4.54-3.amzn2022.0.3, 2.4.54-3.amzn2023.0.4
httpd:2.4
8070020220725152258.3b9f49c4
httpd24
2.4.53-1.96.amzn1
httpd24-devel
2.4.53-1.96.amzn1
httpd24-httpd
0:2.4.34-23.el7.5
httpd24-manual
2.4.53-1.96.amzn1
httpd24-tools
2.4.53-1.96.amzn1
jbcs-httpd24-httpd
0:2.4.51-37.el7jbcs, 0:2.4.51-37.el8jbcs
mod_http2
1.15.7-5.module_el8.6.0+2872+fe0ff7aa, 1.15.7-5.module+el8.6.0+20548+01710940, 1.15.7-5.module+el8.6.0+823+f143cee1
Timeline
Publicly disclosed
Mar 16, 2022
Last updated
Sep 8, 2026
Weakness Type
- CWE-190 Integer Overflow or Wraparound
- CWE-787 Out-of-bounds Write
References
- advisoryRHSA-2022:6753
- advisoryRHSA-2022:7647
- advisoryRHSA-2022:8067
- advisoryRHSA-2022:8840
- advisoryRHSA-2022:8841
FAQ
Common Questions.
Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data.
Affected: HTTP Server (Apache) versions 12.2.1.3.0, 12.2.1.4.0, >= 2.4; Zfs Storage Appliance Kit (Oracle) versions 8.8; Debian Linux versions 9.0, among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including apache 2.4.53, HTTP Server 2.4.53, apache2 2.4.18-2ubuntu3.17+esm5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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