CVE intelligence and bounded remediation

CVE-2021-42109 — VITEC Exterity IPTV products through 2021-04-30 allow privilege escalation to root

Critical CVSS 9.8

VITEC Exterity IPTV products through 2021-04-30 allow privilege escalation to root.

Severity
Critical
CVSS
9.8 (3.1)
Published
2021-10-08
CISA KEV
Not currently listed
Ecosystem
software/application
Weaknesses
CWE-1188

Affected products

  • vitec / exterity_avediaserver
  • vitec / exterity_avediastream_encoders_firmware
  • vitec / avediastream_m9605_firmware
  • vitec / avediastream_m9400_firmware
  • vitec / avediastream_m9405_firmware
  • vitec / avediastream_m9305_firmware

Showing 6 representative product identities from 10 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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