CVE-2017-20240

Summary

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.

Affected Software

Weaknesses

• CWE-208: CWE-208 Observable Timing Discrepancy

Workarounds

Apply the patch from the referenced pull request.

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

CVE Program Container

Additional References

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

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

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