Zero-day vulnerability in Google Android

Security bypass
CVE-2013-7372

The vulnerability in Android's component Apache Harmony led to multiple compromises of a bitcoin transactions.

Vulnerability details

Advisory: SB2013081101 - Security bypass in Google Android

Vulnerable component: Google Android

CVE-ID: CVE-2013-7372

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C

CWE-ID: CWE-310 - Cryptographic Issues

Description:

The vulnerability allows a renote attacker to bypass security restriction on the target system.

The weakness is due to the use of an incorrect offset value by the engineNextBytes function in Apache Harmony, as used in the Java Cryptography Architecture (JCA) in Android . A remote attacker can leverage the resulting PRNG predictability, defeat cryptographic protection mechanisms and launch further attacks on the system.

Successful exploitation of the vulnerablity results in security bypass on the vulnerable system.

External links:

https://bitcoin.org/en/alert/2013-08-11-android
https://android-developers.googleblog.com/2013/08/some-securerandom-thoughts.html

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.