Home/CVE/A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from
CVE

CVE-2021-44790

A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from

A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier.

CRITICAL · CVSS 9.8 EPSS 0.86227
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0

Weakness Classification

Affected Products & Versions

16

Public Exploits & PoCs

2

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · security@apache.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 Dec 2021 · 12:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Advisories

20
suse-csafopenSUSE-SU-2024:11695-1
rhsaRHSA-2022:1139Important
rhsaRHSA-2022:1138Important
rhsaRHSA-2022:1137Important
rhsaRHSA-2022:1136Important
🔗

References & Sources

19
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2022/May/33Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/May/35Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2022/May/38Mailing ListThird Party Advisory
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