CVE-2017-20240

5.9 MEDIUM

Published: June 12, 2026 Modified: June 12, 2026

Description

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://github.com/arodland/Crypt-PBKDF2/pull/6

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes

Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

http://www.openwall.com/lists/oss-security/2026/06/12/3

Source: af854a3a-2127-422b-91ae-364da2661108

4 reference(s) from NVD

Quick Stats

CVSS v3 Score

5.9 / 10.0

EPSS (Exploit Probability)

0.0%

9th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-208

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