What’s Vulnerable › Vulnerabilities

CVE-2015-0886

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-02-28 · updated 2026-06-17
• Weakness: CWE-190

Description

Integer overflow in the crypt_raw method in the key-stretching implementation in jBCrypt before 0.4 makes it easier for remote attackers to determine cleartext values of password hashes via a brute-force attack against hashes associated with the maximum exponent.

Affected products

• Fedoraproject Fedora: 20, 21, 22
• Mindrot Jbcrypt: before 0.4 — fixed in 0.4

How to fix

Upgrade to a fixed version: Mindrot Jbcrypt 0.4. Check the vendor advisory for mitigations.

References

• http://jvn.jp/en/jp/JVN77718330/index.html
• http://jvndb.jvn.jp/jvndb/JVNDB-2015-000033
• http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151496.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151786.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-March/151797.html
• http://www.mindrot.org/projects/jBCrypt/news/rel04.html
• https://bugzilla.mindrot.org/show_bug.cgi?id=2097
• https://lists.apache.org/thread.html/rbd23e3ac8113b4da0a025c0e45170b6ec317383a1cf06090c2c717aa%40%3Ccommits.cassandra.apache.org%3E
• https://lists.apache.org/thread.html/rd5c2256b8dc9935e4bb5e9be90adce58408054bb42523730a40c5548%40%3Ccommits.cassandra.apache.org%3E
• https://lists.apache.org/thread.html/re330cfe9e5d84e3f7da8ace23ec32f38cb3fbd328bf177badd7ad942%40%3Ccommits.cassandra.apache.org%3E
• http://jvn.jp/en/jp/JVN77718330/index.html
• http://jvndb.jvn.jp/jvndb/JVNDB-2015-000033

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