Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id. The generate_session_id function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes using SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Amon2::Plugin::Web::CSRFDefender versions before 7.00 were part of Amon2, which was vulnerable to insecure session ids due to CVE-2025-15604. Note that the author has deprecated this module.
History

Wed, 08 Apr 2026 06:00:00 +0000

Type Values Removed Values Added
Description Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id. The generate_session_id function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes using SHA-1 hash seeded with the built-in rand() function, the PID, and the high resolution epoch time. The PID will come from a small set of numbers, and the epoch time may be guessed, if it is not leaked from the HTTP Date header. The built-in rand function is unsuitable for cryptographic usage. Amon2::Plugin::Web::CSRFDefender versions before 7.00 were part of Amon2, which was vulnerable to insecure session ids due to CVE-2025-15604. Note that the author has deprecated this module.
Title Amon2::Plugin::Web::CSRFDefender versions from 7.00 through 7.03 for Perl generate an insecure session id
Weaknesses CWE-338
CWE-340
References

cve-icon MITRE

Status: PUBLISHED

Assigner: CPANSec

Published: 2026-04-08T05:48:43.633Z

Updated: 2026-04-08T05:48:43.633Z

Reserved: 2026-03-28T19:12:35.387Z

Link: CVE-2026-5082

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-04-08T06:16:28.993

Modified: 2026-04-08T06:16:28.993

Link: CVE-2026-5082

cve-icon Redhat

No data.