Name: CVE-2017-20240: Observable Timing Discrepancy
Creator: Rapid7
Published: 2026-06-12T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2017-20240, CWE-208, CVSS 5.9, EPSS 0.00319

Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks.

These versions use Perl's built-in eq comparison. Discrepancies in timing could be used to guess the underlying derived-key.

CVSS Details

CVSS 3.1 Base Score: 5.9
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade libcrypt-pbkdf2-perl	Jul 12, 2026	Jul 12, 2026

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CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence