T08 · Insecure Dependencies
- Location
SKILL.md:21- Finding
Unpinned Third-Party Executable Dependency
- Content
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Vulnerability Details
File Location:
SKILL.md:21-22andREADME.md:28-30
Vulnerability Type: Unpinned and mutable third-party dependency
Risk Level: MediumComplete Code Snippet:
bash pipx install pyatv || pipx upgrade pyatv pipx reinstall pyatv --python python3.12Technical Analysis
The installation instructions resolve
pyatvand its transitive dependencies without an exact package version or integrity verification. Thepipx upgrade pyatvcommand explicitly replaces the installed package with the latest available release. Consequently, the code installed by users can differ from the code that existed when this Skill was reviewed.The project scripts subsequently invoke the package-provided
atvremoteexecutable. Python packages can execute package-controlled code during installation and whenever their installed entry points are run. If the package publisher, publishing credentials, package repository, or a transitive dependency were compromised, following these instructions could introduce attacker-controlled code.This is a supply-chain exposure rather than evidence that the current
pyatvpackage is malicious.Attack Path
- An attacker compromises the publishing account or release pipeline for
pyatvor one of its transitive dependencies. - The attacker publishes a malicious version that satisfies the unrestricted installation request.
- A user follows the documented setup instructions and runs
pipx install pyatv,pipx upgrade pyatv, orpipx reinstall pyatv. pipxdownloads and installs the mutable package release without checking it against a project-maintained version lock or expected artifact hash.- Malicious package code executes during installation or when the Skill invokes
atvremote. - The payload operates with the privileges of the user who performed the installation or invoked the command.
Impact Assessment
Successful exploitation coul ...[truncated 420 chars]
- An attacker compromises the publishing account or release pipeline for
- Remediation
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Remediation Suggestions
- Replace the unrestricted dependency commands with installation of an explicitly audited version, for example:
bash pipx install "pyatv==<audited-version>" - Remove or discourage unconditional
pipx upgrade pyatv; require review and testing before changing the pinned version. - Maintain a lock file or equivalent reproducible dependency record covering transitive dependencies.
- Verify downloaded artifacts against trusted hashes where the selected installation workflow supports hash verification.
- Document the trusted package index and avoid accepting packages from untrusted or additional indexes.
- Add an update process that reviews release provenance, dependency changes, and security advisories before advancing the pin.
- Run the dependency and its
atvremoteentry point with the least-privileged user account required for device discovery and control.
- Replace the unrestricted dependency commands with installation of an explicitly audited version, for example:
