What is CVE-2017-20240?

CVE-2017-20240 is a medium-severity vulnerability in Arodland Crypt::pbkdf2, classified under CWE-208. CVSS score: 5.9/10. Published 2026-06-12.

How severe is CVE-2017-20240?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Arodland Crypt::pbkdf2

CVE-2017-20240

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.

EPSS: 0.003 (24.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Arodland Crypt::pbkdf2 — versions 0

Weakness classification (CWE)

CWE-208

References

9b29abf9-4ab0-4765-b253-1875cd9b441e (issue-tracking)
9b29abf9-4ab0-4765-b253-1875cd9b441e
9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2017-20240?: CVE-2017-20240 is a medium-severity vulnerability in Arodland Crypt::pbkdf2, classified under CWE-208. CVSS score: 5.9/10. Published 2026-06-12.
How severe is CVE-2017-20240?: Medium severity. CVSS v3 base score is 5.9 out of 10.