VulnerabilityDeferred

CVE-2017-20240

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

MEDIUM 5.9EPSS 0.32%

Does this matter?

Lower severity and a low EPSS score (0.32%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.32% probability · 25th percentile
CISA KEV: Not listed
Weakness: CWE-208
Source: 9b29abf9-4ab0-4765-b253-1875cd9b441e

References

https://github.com/arodland/Crypt-PBKDF2/pull/6
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/changes
http://www.openwall.com/lists/oss-security/2026/06/12/3

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.