CVE-2006-0591

CVE-2006-0591 is a low-severity vulnerability in Solar Designer Crypt Blowfish with a CVSS 2.0 base score of 1.2. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-310.

Key facts

Description

The crypt_gensalt functions for BSDI-style extended DES-based and FreeBSD-sytle MD5-based password hashes in crypt_blowfish 0.4.7 and earlier do not evenly and randomly distribute salts, which makes it easier for attackers to guess passwords from a stolen password file due to the increased number of collisions.

Frequently asked questions

What is CVE-2006-0591?
The crypt_gensalt functions for BSDI-style extended DES-based and FreeBSD-sytle MD5-based password hashes in crypt_blowfish 0.4.7 and earlier do not evenly and randomly distribute salts, which makes it easier for attackers to guess passwords from a stolen password file due to the increased number of collisions.
How severe is CVE-2006-0591?
CVE-2006-0591 has a CVSS 2.0 base score of 1.2, rated low severity.
Is CVE-2006-0591 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-0591?
CVE-2006-0591 affects Solar Designer Crypt Blowfish. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2006-0591?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-0591 published?
CVE-2006-0591 was published on 2006-02-08 and last updated on 2026-06-16.

References

Affected products (1)

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