CVE-2025-2814

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

4.0 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.20%Up 0.2 points since Apr 13, 2025

What each source reports

CVE List Score used 4.0

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

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.

Record: CVE-2025-2814
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-338, CWE-329, CWE-331, CWE-338
Updated: 2026-11-02

EUVDEUVD-2025-10846 4.0

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.

Record: EUVD-2025-10846
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-xpfq-7j72-x4px 4.0

Crypt::CBC versions between 1.21 and 3.04 for Perl may use the rand() function as the default...

Crypt::CBC versions between 1.21 and 3.04 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.

Record: GHSA-xpfq-7j72-x4px
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-329, CWE-338
Updated: 2026-11-02

NVD 4.0

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.

Record: CVE-2025-2814
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-329, CWE-331, CWE-338
Updated: 2026-11-02

OSV 4.0

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

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.

Record: CVE-2025-2814
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-329, CWE-331, CWE-338
Updated: 2026-11-02

OSVDEBIAN-CVE-2025-2814 4.0

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.

Record: DEBIAN-CVE-2025-2814
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-2814 4.0

Record: UBUNTU-CVE-2025-2814
CVSS 3.1: 4.0 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSVopenSUSE-SU-2025:15495-1 No score

perl-Crypt-CBC-3.70.0-1.1 on GA media

These are all security issues fixed in the perl-Crypt-CBC-3.70.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2025:15495-1
Updated: 2026-11-02

Affected products

lds crypt::cbc

Affected packages

Affected packages
Package	Affected	Fixed
`libcrypt-cbc-perl` Debian:12	All versions, plus listed versions 3.04-33.07-1	None known
`libcrypt-cbc-perl` Debian:13	All versions, plus listed versions 3.04-33.07-1	None known
`libcrypt-cbc-perl` Debian:14	before 3.07-1, plus listed versions 3.04-3	3.07-1
`libcrypt-cbc-perl` Ubuntu:16.04:LTS	All versions, plus listed versions 2.33-1	None known
`libcrypt-cbc-perl` Ubuntu:18.04:LTS	All versions, plus listed versions 2.33-1	None known
`libcrypt-cbc-perl` Ubuntu:20.04:LTS	All versions, plus listed versions 2.33-2	None known
`libcrypt-cbc-perl` Ubuntu:22.04:LTS	All versions, plus listed versions 2.33-23.04-3	None known
`libcrypt-cbc-perl` Ubuntu:24.04:LTS	All versions, plus listed versions 3.04-3	None known
`libcrypt-cbc-perl` Ubuntu:25.10	All versions, plus listed versions 3.04-33.07-1	None known
`libcrypt-cbc-perl` Ubuntu:26.10	All versions, plus listed versions 3.07-1	None known
`libcrypt-cbc-perl` Ubuntu:26.04:LTS	All versions, plus listed versions 3.07-1	None known
`perl-Crypt-CBC` openSUSE:Tumbleweed	before 3.70.0-1.1	3.70.0-1.1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-2814 is a medium vulnerability (CVSS 4.0) in Lds Crypt::cbc, published April 12, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. Fixed in libcrypt-cbc-perl 3.07-1.

References

Show 8 moreShow less