CVE-2017-20240

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

State: Published
Severity: 5.9 Medium
Published: Jun 12, 2026
Updated: Jun 12, 2026
Reserved: May 26, 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.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	CISA-ADP

Weaknesses

CWE-208 Observable Timing Discrepancy

Affected Products

Product	Versions
Crypt::PBKDF2ARODLAND	before 0.261630Affected

References

https://github.com/arodland/Crypt-PBKDF2/pull/6issue-tracking
https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148
https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changesrelease-notes
http://www.openwall.com/lists/oss-security/2026/06/12/3

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