Vulnerability Name:

CVE-2018-12271

Assigned:2018-06-13
Published:2018-06-13
Updated:2018-08-10
Summary:** DISPUTED ** An issue was discovered in the com.getdropbox.Dropbox app 100.2 for iOS. The LAContext class for Biometric (TouchID) validation allows authentication bypass by overriding the LAContext return Boolean value to be "true" because the kSecAccessControlUserPresence protection mechanism is not used. 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 iOS devices on which a jailbreak has occurred.
CVSS v3 Severity:6.4 Medium (CVSS v3 Vector: CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Exploitability Metrics:Attack Vector (AV): Physical
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
9.3 Critical (CCN CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:6.9 Medium (CVSS v2 Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
6.9 Medium (CCN CVSS v2 Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Medium
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-287
References:Source: MISC
Type: VENDOR_ADVISORY
https://gist.github.com/tanprathan/6e8ed195a2e05b7f9d9a342dbdacb349

Source: MISC
Type: VENDOR_ADVISORY
https://hackerone.com/reports/363544

Source: MISC
Type: UNKNOWN
https://www.dropbox.com/s/n880ob3gtvfwryu/20180609_013320.mp4?dl=0

Vulnerable Configuration:Configuration 1:
  • cpe:/a:dropbox:dropbox:100.2::~~~iphone_os~~:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    dropbox dropbox 100.2