CVE-2021-44790 — CVE & Security Advisory Radar

🎯 CVE-2021-44790 LOW 3.1 🔥 EPSS 96.8% 🧪 PoC 🇪🇺 EUVD

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CVE-2021-44790 | 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.

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.

Klassifikation & Betroffenheit:

Apache Software Foundation Apache HTTP Server Apache HTTP Server 2.4 ≤2.4.51apache http_server *fedoraproject fedora 34fedoraproject fedora 35fedoraproject fedora 36debian debian_linux 10.0debian debian_linux 11.0tenable tenable.sc *

Improper Restriction of Operations within the Bounds of a Memory Buffer 🎯 High

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

🛡️ Empfohlene Mitigation: Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, many languages that perform their own memory management, such as Java and Perl, are not subject to buffer overflows. Other languages, such as Ada and C#, typically provide overflow prot…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-14 · Client-side Injection-induced Buffer Ove… (High) CAPEC-24 · Filter Failure through Buffer Overflow (High) CAPEC-42 · MIME Conversion (High) CAPEC-44 · Overflow Binary Resource File (Very High) CAPEC-45 · Buffer Overflow via Symbolic Links (High) CAPEC-100 · Overflow Buffers (Very High) CAPEC-123 · Buffer Manipulation (Very High)

🧩 Ähnliche Schwachstellen (Hersteller/Klasse/Score-Band):

CVE-2025-54941 4.6 CVE-2025-62503 4.6 CVE-2024-45477 4.6 CVE-2024-37389 4.6 CVE-2024-29217 4.6

🧪 Exploit-Evidenz: EDB-51193 · Apache 2.4.x - Buffer Overflow verified

🐙 nuPacaChi/-CVE-2021-44790 🐙 CerberusMrXi/Apache-Lua-Buffer-O

🩹 Patch verfügbar (OSV):

🩹 fed3b8a079835cd63648d8903bc69243ce2c472a (Commit)

📚 Referenzen & Quellen:

🇪🇺 Original-Eintrag (ENISA EUVD) 🇺🇸 NVD-Eintrag

Ausnutzungs-Zeitleiste:

Reserviert 2021

Veröffentlicht 12/2021

Heute 13.09.

Veröffentlicht:20.12.2021

Aktualisiert:17.06.2026 04:12

Assigner (CNA):apache

EUVD-ID:EUVD-2021-31595

Quellen: 🇪🇺 EUVD-Datenbank (ENISA) + 🇺🇸 NVD-Anreicherung · 24-h-Cache

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

Tier	2026-08-29	2026-09-12
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

3.1 LOW

🇪🇺 EUVD

EPSS

96.8%

CVE-2021-44790 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

🧪 Apache Software Foundation

CVE-2021-44790 | 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.

CWE-119: Memory Corruption ✓ Offizieller Patch / Advisory verfügbar

💡 Gegenmaßnahme: Sicherheits-Update des Herstellers zeitnah einspielen und Netzwerksegmentierung prüfen.

20.12.2021

🛡️ Details ➔

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