Auth bypass in Linecorp Line
CVE-2018-13434
An issue was discovered in the LINE jp.naver.line application 8.8.0 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
Vulnerability class: Broken Authentication
EPSS: 0.004 (28.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.0/AV:P/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Linecorp Line — versions 8.8.0
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2018-13434?
- CVE-2018-13434 is a medium-severity vulnerability in Linecorp Line, classified under Improper Authentication. CVSS score: 6.3/10. Published 2018-08-16.
- How severe is CVE-2018-13434?
- Medium severity. CVSS v3 base score is 6.3 out of 10.