{"cve":"CVE-2013-7372","nvd":{"published":"2014-04-29T20:55:08.933","modified":"2026-06-17T00:01:51.020","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-310"],"references":["http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.html","http://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdf","https://android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java","https://bitcoin.org/en/alert/2013-08-11-android","http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.html"],"products":["apache:harmony","google:android"],"source":"nvd","synced_at":"2026-10-19T20:32:06.812358378+00:00"},"epss":{"cve":"CVE-2013-7372","score":0.02429,"percentile":0.84235,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}