CWE-340
Generation of Predictable Numbers or Identifiers
ClassIncomplete
Description
The product uses a scheme that generates numbers or identifiers that are more predictable than required.
Hierarchy (View 1000)
CVEs mapped to this weakness (25)
page 2 of 2| CVE | Sev | Risk | CVSS | EPSS | KEV | Published | Description |
|---|---|---|---|---|---|---|---|
| CVE-2026-5083 | Med | 0.34 | 5.3 | 0.00 | Apr 8, 2026 | Ado::Sessions versions through 0.935 for Perl generates insecure session ids. The session id is generated from a SHA-1 hash seeded with the built-in rand function, the epoch time, and the PID. 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. Predicable session ids could allow an attacker to gain access to systems. Note that Ado is no longer maintained, and has been removed from the CPAN index. It is still available on BackPAN. | |
| CVE-2026-5082 | Med | 0.34 | 5.3 | 0.00 | Apr 8, 2026 | 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. | |
| CVE-2024-12034 | Med | 0.34 | 5.3 | 0.00 | Dec 24, 2024 | The Advanced Google reCAPTCHA plugin for WordPress is vulnerable to IP unblocking in all versions up to, and including, 1.25. This is due to the plugin not utilizing a strong unique key when generating an unblock request. This makes it possible for unauthenticated attackers to unblock their IP after being locked out due to too many bad password attempts | |
| CVE-2025-3449 | Med | 0.27 | 4.2 | 0.00 | Oct 7, 2025 | A Generation of Predictable Numbers or Identifiers vulnerability in the SDM component of B&R Automation Runtime versions before 6.4 may allow an unauthenticated network-based attacker to take over already established sessions. | |
| CVE-2026-28810 | Low | 0.17 | 3.7 | 0.00 | Apr 7, 2026 | Generation of Predictable Numbers or Identifiers vulnerability in Erlang/OTP kernel (inet_res, inet_db modules) allows DNS Cache Poisoning. The built-in DNS resolver (inet_res) uses a sequential, process-global 16-bit transaction ID for UDP queries and does not implement source port randomization. Response validation relies almost entirely on this ID, making DNS cache poisoning practical for an attacker who can observe one query or predict the next ID. This conflicts with RFC 5452 recommendations for mitigating forged DNS answers. inet_res is intended for use in trusted network environments and with trusted recursive resolvers. Earlier documentation did not clearly state this deployment assumption, which could lead users to deploy the resolver in environments where spoofed DNS responses are possible. This vulnerability is associated with program files lib/kernel/src/inet_db.erl and lib/kernel/src/inet_res.erl. This issue affects OTP from OTP 17.0 until OTP 28.4.2, 27.3.4.10 and 26.2.5.19 corresponding to kernel from 3.0 until 10.6.2, 10.2.7.4 and 9.2.4.11. |