CVE-2026-12249: fallo crítico en adsys
Canonical ADSys Trust Store Poisoning via Plaintext HTTP Certificate Auto-Enrollment
Publicada el
28Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 9epss 0.1%
probabilidad de explotación
0.1%top 97% de las CVE
explotación observada
noninguna fuente lo reporta
An issue was discovered in Canonical ADSys upstream versions through v0.16.2. During Active Directory Certificate Services (AD CS) certificate auto-enrollment via the vendored Samba client script (internal/policies/certificate/python/vendor_samba/gp/gp_cert_auto_enroll_ext.py), ADSys utilizes a plaintext HTTP connection (http://) instead of a secure HTTPS connection (https://) to request the CA certificate from the Active Directory Certificate Services server (GetCACert). An unauthenticated network attacker positioned between the managed Ubuntu host and the configured AD CS CA hostname can conduct a Man-in-the-Middle (MITM) attack. By intercepting the plaintext HTTP request, the attacker can supply an arbitrary, attacker-controlled Root CA certificate. Because the system automatically accepts this certificate and registers it into the local system trust store via update-ca-certificates, this results in system-wide trust store poisoning. Consequently, TLS clients utilizing the operating system trust store on the affected machine will accept rogue certificates for arbitrary domains, enabling persistent decryption and interception of subsequent TLS connections. This issue is resolved in version v0.16.3.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/S:N/AU:Y/R:I/V:D/RE:L/U:Red
Productos afectados
adsysCanonical · Ubuntu 20.04 LTSCanonical · Ubuntu 22.04 LTSCanonical · Ubuntu 24.04 LTSCanonical · Ubuntu 25.10Canonical · Ubuntu 26.04 LTSCVEs relacionadas — adsys
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-11386CRITICALubuntu-pro-client Input Validation Vulnerability Leading to Arbitrary APT Directive Injection and Remote Code ExecutionEPSS 0.5%CVE-2026-12391MEDIUMubuntu-pro-client Local Privilege Escalation and Information Disclosure via Symlink Arbitrary File Read in collect-logsEPSS 0.2%CVE-2026-15226HIGHsnapd snap-confine Sandbox Confinement Bypass via Omission of setuid Restriction in Seccomp TemplatesEPSS 0.2%CVE-2026-8933HIGHsnap-confine Local Privilege Escalation via Capabilities Misconfiguration or Flaw in Execution Environment SetupEPSS 0.2%CVE-2026-3888HIGHLocal Privilege Escalation in snapdEPSS 0.2%CVE-2026-9494MEDIUMubuntu-pro-client Information Disclosure via Cleartext Bearer Token Exposure in Process Command LineEPSS 0.1%