Dropbox App up to 98.2.2 on Android Biometric Validation FingerprintManager improper authentication ⚔ [Disputed]

Summaryinfo

A vulnerability classified as critical was found in Dropbox App up to 98.2.2 on Android. This issue affects the function FingerprintManager of the component Biometric Validation. Executing a manipulation can lead to improper authentication. This vulnerability appears as CVE-2018-12445. The physical device can be targeted for the attack. There is no available exploit. It is still unclear if this vulnerability genuinely exists.

Detailsinfo

A vulnerability classified as critical was found in Dropbox App up to 98.2.2 on Android (Cloud Software). This vulnerability affects the function FingerprintManager of the component Biometric Validation. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

** DISPUTED ** An issue was discovered in the com.dropbox.android application 98.2.2 for Android. The FingerprintManager class for Biometric validation allows authentication bypass through the callback method from onAuthenticationFailed to onAuthenticationSucceeded with null, because the fingerprint API in conjunction with the Android keyGenerator class is not implemented. In other words, an attacker could authenticate with an arbitrary fingerprint. NOTE: the vendor indicates that this is not an attack of interest within the context of their threat model, which excludes Android devices on which rooting has occurred.

The weakness was presented 06/20/2018 (Website). The advisory is shared for download at gist.github.com. This vulnerability was named CVE-2018-12445 since 06/15/2018. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See VDB-119729 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Cloud Software

Vendor

• Dropbox

Name

• App

Version

• 98.2.0
• 98.2.1
• 98.2.2

CPE 2.3info

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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