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Advisories

Semaphore UI through 2.19.16 RCE via Task Environment Ansible Variable Override

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Severity
high
Date
Affecting

  • Semaphore UI <= 2.19.16

CWE
  • CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
aditya-manit, Zachariah Mithani
Description
Semaphore UI through 2.19.16 contains a remote code execution vulnerability that allows users with the task_runner role to override protected Ansible variables by supplying arbitrary keys in the task environment JSON. Attackers can POST tasks setting ansible_ssh_common_args with a ProxyCommand or ansible_connection=local to execute commands as the Semaphore server user, exposing encryption keys, SSH keys and stored secrets.

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