CVE-2026-34980

🎯 CVE-2026-34980 🧪 PoC 🇪🇺 EUVD

💬 0 Diskussion 📄 .md Alle CVEs anzeigen ✕

CVE-2026-34980 | OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. At time of publication, there are no publicly available patches.

Klassifikation & Betroffenheit:

CWE-20 OpenPrinting cups ≤ 2.4.16openprinting cups *

Improper Input Validation 🎯 High

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

🛡️ Empfohlene Mitigation: Consider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build "recognizers" for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of allowi…

Vollständige Definition bei MITRE ➔

⚔️ Typische Angriffsmuster (CAPEC):

CAPEC-10 · Buffer Overflow via Environment Variable… (High) CAPEC-13 · Subverting Environment Variable Values (Very High) CAPEC-101 · Server Side Include (SSI) Injection (High) CAPEC-104 · Cross Zone Scripting (High) CAPEC-108 · Command Line Execution through SQL Injec… (Very High) CAPEC-109 · Object Relational Mapping Injection (High) CAPEC-110 · SQL Injection through SOAP Parameter Tam… (Very High) CAPEC-120 · Double Encoding (Medium)

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

T1562.003 · Impair Defenses:Impair Command His… T1574.006 · Hijack Execution Flow:Dynamic Link… T1574.007 · Hijack Execution Flow:Path Interce…

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

CVE-2025-63783 7.6 CVE-2024-3841 7.6 CVE-2019-0965 7.6 CVE-2026-85532 7.5 CVE-2026-102823 7.5

🧪 Exploit-Evidenz:

🐙 HORKimhab/CVE-2026-34980

🇩🇪 BSI-Sicherheitshinweise: BSI · mittel · CUPS: Mehrere Schwachstellen ↗

📚 Referenzen & Quellen:

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

🔗 github.com/OpenPrinting/cups/security/advisories/GHS…

Ausnutzungs-Zeitleiste:

Reserviert 2026

Veröffentlicht 04/2026

Heute 22.10.

CVSS-Vektor-Analyse: 6.1

AV · Angriffsvektor Benachbart

AC · Komplexität Gering

PR · Privilegien Keine

UI · Interaktion Keine

CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

CNA-Bewertung (GitHub_M): 6.1 CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA…

Veröffentlicht:03.04.2026

Aktualisiert:24.07.2026 21:10

Assigner (CNA):GitHub_M

EUVD-ID:EUVD-2026-18887

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

CWE-20 ✓ Offizieller Patch / Advisory verfügbar

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

Tier	CVEs	Anteil
≥90 %	725	0,2 %
≥50 %	3.224	0,9 %
≥10 %	22.086	5,9 %
<10 %	346.723	93,0 %

Tier

CVEs

Anteil

≥90 %

725

0,2 %

≥50 %

3.224

0,9 %

≥10 %

22.086

5,9 %

<10 %

346.723

93,0 %

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