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Low 34 Monero

separate swb file saving from encryption call, enable android swb file location selection, and clean up some of the swb ui code a bit

Public commit record

What the developer wrote

Authored by julian

50/100 · Thin
separate swb file saving from encryption call, enable android swb file location selection, and clean up some of the swb ui code a bit
✓ Specific, descriptive subject✓ Names a concrete action or component! No meaningful explanatory body
The short version

What changed, and why it matters

This commit rewrites how Stack Wallet creates its encrypted backup (.swb) files. The main functional change is that the encryption helper no longer writes the file itself; instead it returns the encrypted text, and the caller writes it to disk. On Android, the file is now written with a plain file API to a user-chosen location (a TODO comment notes that Storage Access Framework support is still pending). The change also enables Android users to pick a backup folder, which they could not do before. There is no direct evidence in the commit that this fixes a known security vulnerability, but it does change where sensitive backup data is stored and how file-overwrite behavior is handled.

Recommended action

Treat as a routine refactor with potential security side effects. Review the new Android file-writing path for unsafe directory selection, path traversal, and world-readable file permissions. Verify that the removed file-existence guard does not allow accidental or malicious overwrite of existing backups. Confirm whether the missing SAF implementation is tracked as a security item. No urgent patch is indicated solely from this diff.

Security signals we found

01

Sensitive backup ciphertext now written by caller code instead of library helper

02

Android backup location selection enabled, changing file storage scope

03

File-existence guard before backup write removed, allowing overwrite behavior change

04

TODO SAF comment indicates Android file writing still uses direct file API rather than Storage Access Framework

05

No explicit security advisory, CVE, or researcher attribution in commit or supplied references

Risk score

Why this scored 34/100

Our methodology →
Potential impact 8/30
Exploitability 6/25
Stealth signal 4/15
Affected reach 7/15
Confidence 6/10
Evidence quality 3/5
Human-validated context

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