AliasVault App on Android/iOS: Unauthorized Access to Backup Files

Summary

A security flaw in the AliasVault App on Android and iOS devices allows an attacker with local access to potentially access sensitive backup files. This could potentially lead to unauthorized access to user data. To fix this issue, update the app to version 0.26.0 or later. This update is available, and we recommend applying it to ensure your data remains secure.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
aliasvault	aliasvault	<= 0.25.3	–

Original title

A vulnerability was identified in AliasVault App up to 0.25.3 on Android/iOS. This vulnerability affects unknown code of the file shared_prefs/aliasvault.xml of the component Backup Handler. The ma...

Original description

A vulnerability was identified in AliasVault App up to 0.25.3 on Android/iOS. This vulnerability affects unknown code of the file shared_prefs/aliasvault.xml of the component Backup Handler. The manipulation of the argument accessToken/refreshToken/metadata/key_derivation_params/auth_methods leads to exposure of backup file to an unauthorized control sphere. An attack has to be approached locally. The attack is considered to have high complexity. It is stated that the exploitability is difficult. The exploit is publicly available and might be used. Upgrading to version 0.26.0 is able to resolve this issue. The identifier of the patch is 873ecc03f92238e162f98a068ad56069a922b4f6/0bd662320174d8265dfe3b05a04bc13efc960532. It is recommended to upgrade the affected component. The creator of the software explains: "Because of AliasVault's zero-knowledge encryption design, the tokens stored in aliasvault.xml are API session tokens that cannot decrypt the vault on their own: the master password is required for that. So while this isn't a direct vault compromise risk, there's no reason to include them in backups either."

nvd CVSS2.0 1.0

nvd CVSS3.1 2.5

nvd CVSS4.0 2.0

Vulnerability type

CWE-285 Improper Authorization

CWE-530