vulnerability / NVI-00015317 / Revision 1
psd-tools vulnerable to arbitrary file write via smart-object filename
GitHub lists this reviewed advisory for psd-tools. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
psd-tools
source listed<= 1.17.0
# psd-tools: arbitrary file write/read via smart-object path traversal ## Summary In `psd-tools` (all releases exposing the `SmartObject` API through **v1.17.0**), `SmartObject.save()` writes an embedded smart object to a path taken verbatim from the PSD file. Because that name is attacker-controlled and unsanitised, a tool that extracts embedded objects from an untrusted `.psd` can be made to write attacker-chosen bytes to an attacker-chosen path (absolute or `../`-traversing), outside its intended output directory. A secondary issue in `SmartObject.open()` for external-kind smart objects allows the attacker-controlled `fullPath` descriptor to be used as an arbitrary file **read** path, enabling exfiltration of the read content to the controlled write destination. Both issues are fixed in **v1.17.1**. ## Details ### Write path — `SmartObject.save()` (primary) `src/psd_tools/api/smart_object.py:170-179` (tag `v1.17.0`): ```python def save(self, filename: str | None = None) -> None: if filename is None: filename = self.filename # untrusted, straight from the file with open(filename, "wb") as f: f.write(self.data) # attacker-cont
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
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04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-2rmg-vrx8-9j2f ↗
GitHub Advisory Database · vendor advisory
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Public revision history
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- Revision 1 ·
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