CVE-2017-20240 Affecting libcrypt-pbkdf2-perl package, versions <0.261630-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published13 Jun 2026
- disclosed12 Jun 2026
Introduced: 12 Jun 2026
CVE-2017-20240 (opens in a new tab)How to fix?
Upgrade Debian:unstable libcrypt-pbkdf2-perl to version 0.261630-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream libcrypt-pbkdf2-perl package and not the libcrypt-pbkdf2-perl package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2017-20240
- 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