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.

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
ARODLAND Crypt::PBKDF2 unaffected
Version Status Constraints
0 affected < 0.261630

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Project Subscriptions

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Advisories

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Fixes

Solution

Upgrade to version 0.261630 or later.

Workaround

Apply the patch from the referenced pull request.

References
Link Providers
http://www.openwall.com/lists/oss-security/2026/06/12/3 cve-icon
https://github.com/arodland/Crypt-PBKDF2/pull/6 cve-icon cve-icon
https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.161520/source/lib/Crypt/PBKDF2.pm#L123-148 cve-icon cve-icon
https://metacpan.org/release/ARODLAND/Crypt-PBKDF2-0.261630/changes cve-icon cve-icon
History

Fri, 12 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
References

Fri, 12 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 12 Jun 2026 13:45:00 +0000

Type Values Removed Values Added
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.
Title Crypt::PBKDF2 versions before 0.261630 for Perl are vulnerable to timing attacks
Weaknesses CWE-208
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published:

Updated: 2026-06-12T16:59:33.477Z

Reserved: 2026-05-26T18:23:21.387Z

Link: CVE-2017-20240

cve-icon Vulnrichment

Updated: 2026-06-12T16:06:52.937Z

cve-icon NVD

Status : Deferred

Published: 2026-06-12T14:16:28.660

Modified: 2026-06-12T17:16:22.133

Link: CVE-2017-20240

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-12T17:30:07Z

Weaknesses