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Fencer Intel
medium 4.0

CVE-2025-2814 json

Crypt::CBC versions between 1.21 and 3.05 for Perl may use insecure rand() function for cryptographic functions

published last yr. modified 4mo ago also EUVD-2025-10846

cvss
4.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 10%
public exploits
0
none known

Summary

Crypt::CBC versions between 1.21 and 3.05 for Perl may use the rand() function as the default source of entropy, which is not cryptographically secure, for cryptographic functions.

This issue affects operating systems where "/dev/urandom'" is unavailable.  In that case, Crypt::CBC will fallback to use the insecure rand() function.

Patch / fix

  • libcrypt-cbc-perl Debian 14 3.07-1

debian advisories DEBIAN-CVE-2025-2814

  • perl-Crypt-CBC openSUSE Tumbleweed 3.70.0-1.1

opensuse advisories openSUSE-SU-2025:15495-1

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-2814 updated cvss 4.8

Crypt-CBC: Crypt::CBC versions between 1.21 and 3.04 for Perl may use insecure rand() function for cryptographic functions

  • Red Hat Enterprise Linux 7 perl-Crypt-CBC
    affected: workaround, no fix planned “Out of support scope”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.20% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CNA 3.1 4.0 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

  • LDS Crypt::CBC

Classification

Weakness
  • CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
  • CWE-329 Generation of Predictable IV with CBC Mode
  • CWE-331 Insufficient Entropy

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.