CVE-2022-21723 — CVE & Security Advisory Radar

🎯 CVE-2022-21723 CRITICAL 9.1 🔥 EPSS 4.5% 🧪 PoC 🇪🇺 EUVD

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CVE-2022-21723 | PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In versions 2.11.1 and prior, parsing an incoming SIP message that contains a malformed multipart can potentially cause out-of-bound read access. This issue affects all PJSIP users that accept SIP multipart. The patch is available as commit in the `master` branch. There are no known workaround

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In versions 2.11.1 and prior, parsing an incoming SIP message that contains a malformed multipart can potentially cause out-of-bound read access. This issue affects all PJSIP users that accept SIP multipart. The patch is available as commit in the `master` branch. There are no known workarounds.

Klassifikation & Betroffenheit:

pjsip pjproject ≤ 2.11.1teluu pjsip *asterisk certified_asterisk 16.8.0sangoma asterisk *debian debian_linux 9.0debian debian_linux 10.0

Improper Control of Generation of Code ('Code Injection') 🎯 Medium

The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.

🛡️ Empfohlene Mitigation: Refactor your program so that you do not have to dynamically generate code.

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-35 · Leverage Executable Code in Non-Executab… (Very High) CAPEC-77 · Manipulating User-Controlled Variables (Very High) CAPEC-242 · Code Injection (High)

🎯 ATT&CK-Techniken (Kill-Chain-Verhalten):

T1027.006 · Obfuscated Files or Information: H… T1027.009 · Obfuscated Files or Information: E… T1564.009 · Hide Artifacts: Resource Forking

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

CVE-2023-38703 9.8 CVE-2022-31031 9.8 CVE-2022-24786 9.8 CVE-2022-39269 9.1 CVE-2022-21722 9.1

🩹 Patch verfügbar (OSV):

🩹 c28961a7d88cf065f693d1ea412c3e2b35e6d18e (Commit) 🩹 4cf4f5f7076125bc649727540de5922c21e0558f (Commit)

📚 Referenzen & Quellen:

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

Ausnutzungs-Zeitleiste:

Reserviert 2022

Veröffentlicht 01/2022

Heute 07.09.

CVSS-Vektor-Analyse: 9.1

AV · Angriffsvektor Netzwerk

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Keine

S · Scope Unverändert

C · Vertraulichkeit Hoch

I · Integrität Keine

A · Verfügbarkeit Hoch

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Veröffentlicht:27.01.2022

Aktualisiert:17.06.2026 04:26

Assigner (CNA):GitHub_M

EUVD-ID:EUVD-2022-26905

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

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

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

Tier	2026-08-29	2026-09-06
≥90 %	4	0
≥50 %	4	0
≥10 %	3	0
<10 %	304	300

9.1 CRITICAL

🇪🇺 EUVD

EPSS

4.5%

CVE-2022-21723 🌐 Netzwerk (Remote) 🔓 Keine Authentifizierung nötig

🧪 pjsip

CVE-2022-21723 | PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In versions 2.11.1 and prior, parsing an incoming SIP message that contains a malformed multipart can potentially cause out-of-bound read access. This issue affects all PJSIP users that accept SIP multipart. The patch is available as commit in the `master` branch. There are no known workaround

CWE-94: Code Injection ✓ Offizieller Patch / Advisory verfügbar

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

27.01.2022

🛡️ Details ➔

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