Gnutls: gnutls: certificate validation bypass due to improper handling of uri and srv sans
CVSS Skor
7.1
EPSS İhtimal
%0.5
Risk Skoru
0.0
Yayın
4 ay önce
Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.
Envanterimdeki Etkisi
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Zafiyet Açıklaması
DayBreach CVE AI Araştırması
CVE-2026-42012 için toplanan üretici, dağıtım, yama ve güvenlik kaynağı kayıtlarını karşılaştırıp kanıt bağlantılı bir açıklama hazırlayalım.
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
IMPACT — Etkilenen Ürünler ve Yazılımlar
Affected Products
The following products are affected by CVE-2026-42012 vulnerability. Even if our threat engine is aware of the exact versions of the products that are affected, the information is represented below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | redhat | gnutls | İncele |
| 2 | Red Hat | Red Hat Enterprise Linux 10 | İncele |
| 3 | Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | İncele |
| 4 | Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | İncele |
| 5 | Red Hat | Red Hat Enterprise Linux 8 | İncele |
| 6 | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | İncele |
| 7 | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | İncele |
| 8 | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | İncele |
| 9 | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | İncele |
| 10 | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | İncele |
| 11 | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | İncele |
| 12 | Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | İncele |
| 13 | Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | İncele |
| 14 | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | İncele |
| 15 | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | İncele |
| 16 | Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | İncele |
| 17 | Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | İncele |
| 18 | Red Hat | Red Hat Enterprise Linux 9 | İncele |
| 19 | Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | İncele |
| 20 | Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | İncele |
| 21 | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | İncele |
| 22 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | İncele |
| 23 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | İncele |
| 24 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | İncele |
| 25 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.17 | İncele |
| 26 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | İncele |
| 27 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | İncele |
| 28 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | İncele |
| 29 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | İncele |
| 30 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.18 | İncele |
| 31 | Red Hat | Cert Manager support for Red Hat OpenShift release 1.20 | İncele |
| 32 | Red Hat | Red Hat Discovery 2 | İncele |
| 33 | Red Hat | Red Hat Discovery 2 | İncele |
| 34 | Red Hat | Red Hat Hardened Images | İncele |
| 35 | Red Hat | Red Hat OpenShift AI 3.4 | İncele |
| 36 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 37 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 38 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 39 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 40 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 41 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 42 | Red Hat | Red Hat Update Infrastructure 5 | İncele |
| 43 | Red Hat | Red Hat Enterprise Linux 6 | İncele |
| 44 | Red Hat | Red Hat OpenShift Container Platform 4 | İncele |
RED HAT CSAF/VEX — Ürün Etki Kontrolü
SCORING — CVSS Çoklu Kaynak Skoru
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from various sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.1 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N | NVD |
| 7.1 | CVSS 3.x | — | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N | Microsoft MSRC |
| 7.1 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N | CVE CNA |
Yama ve İyileştirme Rehberi (Solution)
Solution & Remediation Advisory
1 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.
Public exploit ve aktif sömürü durumu
Doğrulanmış exploit istihbaratı
Bu CVE için henüz doğrulanmış public PoC, exploit repository’si veya Metasploit modülü bulunamadı.
Zafiyet Dağılımı ve Saldırı Kalıpları (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-42012 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-42012 weaknesses.
Saldırı Vektörü ve Erişilebilirlik Karakteristiği
Resmi Kaynaklar ve Danışma Bültenleri
İlgili Benzer Açıklar
Bu açığı API ile alın
Etkilenen ürünler, sürüm aralıkları, istismar durumu ve yama bilgisi tek istekte; ücretsiz anahtarla.
curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-42012"