CVE-2013-7372

EXPLOITED IN THE WILD

Apache Harmony <6.0M3 - Cryptographic Protection Bypass

Title source: llm

Exploitation Summary

CVE-2013-7372 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io).

Description

The engineNextBytes function in classlib/modules/security/src/main/java/common/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java in the SecureRandom implementation in Apache Harmony through 6.0M3, as used in the Java Cryptography Architecture (JCA) in Android before 4.4 and other products, when no seed is provided by the user, uses an incorrect offset value, which makes it easier for attackers to defeat cryptographic protection mechanisms by leveraging the resulting PRNG predictability, as exploited in the wild against Bitcoin wallet applications in August 2013.

References (4)

Core 4

Core References

Exploit x_refsource_misc

http://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdf

Patch x_refsource_confirm

https://android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java

Various Sources x_refsource_misc

https://bitcoin.org/en/alert/2013-08-11-android

Patch x_refsource_confirm

http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.html

Scores

EPSS 0.0076

EPSS Percentile 73.7%

Details

VulnCheck KEV 2013-08-14

InTheWild.io 2014-04-30

CWE

CWE-310

Status published

Products (13)

apache/harmony < 6.0

google/android 4.0

google/android 4.0.1

google/android 4.0.2

google/android 4.0.3

google/android 4.0.4

google/android 4.1

google/android 4.1.2

google/android 4.2

google/android 4.2.1

... and 3 more

Published Apr 29, 2014

Tracked Since Feb 18, 2026