Unrated severityNVD Advisory· Published Apr 29, 2014· Updated Jun 17, 2026
CVE-2013-7372
CVE-2013-7372
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.
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Affected products
14cpe:2.3:o:google:android:*:*:*:*:*:*:*:*+ 11 more
- cpe:2.3:o:google:android:*:*:*:*:*:*:*:*range: <=4.3.1
- cpe:2.3:o:google:android:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.1:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.3:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.4:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.1:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.1.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.2.1:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.2.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.3:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
4- android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.htmlnvdPatch
- android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.javanvdPatch
- www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdfnvdExploit
- bitcoin.org/en/alert/2013-08-11-androidnvd
News mentions
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