Vulnerability Details : CVE-2013-7372
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.
Exploit prediction scoring system (EPSS) score for CVE-2013-7372
Probability of exploitation activity in the next 30 days: 0.24%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 64 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2013-7372
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST |
CWE ids for CVE-2013-7372
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2013-7372
-
http://www.nds.rub.de/media/nds/veroeffentlichungen/2013/03/25/paper_2.pdf
Exploit
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https://android.googlesource.com/platform/libcore/+/kitkat-release/luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java
luni/src/main/java/org/apache/harmony/security/provider/crypto/SHA1PRNG_SecureRandomImpl.java - platform/libcore - Git at GooglePatch
-
https://bitcoin.org/en/alert/2013-08-11-android
Android Security Vulnerability
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http://android-developers.blogspot.com.au/2013/08/some-securerandom-thoughts.html
Android Developers Blog: Some SecureRandom ThoughtsPatch
Products affected by CVE-2013-7372
- cpe:2.3:a:apache:harmony:*:m3:*:*:*:*:*:*
- cpe:2.3:o:google:android:*:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.1:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.1:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.4:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.0.3:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.1.2:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.2.1:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.3:*:*:*:*:*:*:*
- cpe:2.3:o:google:android:4.2.2:*:*:*:*:*:*:*