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Low 38 Bitcoin

chore: use pillow 12.1.1 for python >= 3.10

TZbfe88d22 View source ↗
Public commit record

What the developer wrote

Authored by M1nd3r

93/100 · Strong
chore: use pillow 12.1.1 for python >= 3.10

- fix for vulnerability (OOB write) https://github.com/trezor/trezor-firmware/security/dependabot/109
- pillow is used only by `toiftool`(python CLI tool), the issue does not affect the firmware itself
- patched pillow version (12.1.1) is not compatible with python 3.9, fix affects only usage with python >= 3.10

[no changelog]
✓ Descriptive subject✓ Names a concrete action or component✓ Uses a recognizable type or scope✓ Provides detailed explanatory context✓ Links an issue, advisory, or supporting reference✓ Names security-relevant behavior explicitly
The short version

What changed, and why it matters

This commit updates the Python image-processing library Pillow from a vulnerable version to a fixed one, but only for users running Python 3.10 or newer. The commit message explicitly says it fixes an out-of-bounds write vulnerability in Pillow, and that the vulnerable library is only used by a command-line helper tool called toiftool, not by the Trezor firmware that runs on the hardware wallet itself. So the security risk is limited to developers or build machines that use that helper tool with Python 3.10+.

Recommended action

Users and developers who run toiftool or build the project with Python 3.10+ should ensure the lock file is applied so Pillow 12.1.1 is used. Those still on Python 3.9 should consider upgrading Python or separately updating Pillow, because the vulnerable 11.3.0 remains allowed for that version. End-users of Trezor hardware wallets do not need to take action because the firmware itself is unaffected.

Security signals we found

01

Dependency update to address reported out-of-bounds write in third-party library Pillow

02

Vendor explicitly states the issue does not affect Trezor firmware itself

03

Vendor explicitly states Pillow is only used by toiftool, a Python CLI tool

04

Conditional version pinning leaves Pillow 11.3.0 in use for Python <3.10, so the patch is partial for older Python environments

05

No changelog entry recorded ([no changelog])

Risk score

Why this scored 38/100

Our methodology →
Potential impact 8/30
Exploitability 7/25
Stealth signal 6/15
Affected reach 5/15
Confidence 8/10
Evidence quality 4/5
Human-validated context

Community notes

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