A certain pseudo-random number generator (PRNG) algorithm that uses ADD with 0 random hops (aka "Algorithm A0"), as used in OpenBSD 3.5 through 4.2 and NetBSD 1.6.2 through 4.0, allows remote attackers to guess sensitive values such as (1) DNS transaction IDs or (2) IP fragmentation IDs by observing a sequence of previously generated values. NOTE: this issue can be leveraged for attacks such as DNS cache poisoning, injection into TCP packets, and OS fingerprinting.
Conclusion & alert: CVE-2008-1148 is rated Moderate Risk (51.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.42%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.97% | 1.42% | +0.45% |
| 2 | 2025-03-17 | 3.08% | 0.97% | -2.10% |
| 3 | 2025-02-13 | — | 3.08% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| cosmicperl | directory_pro | 10.0.3 | cpe:2.3:a:cosmicperl:directory_pro:10.0.3:*:*:*:*:*:*:* |
| darwin | darwin | 1.0 | cpe:2.3:a:darwin:darwin:1.0:*:*:*:*:*:*:* |
| darwin | darwin | 9.1 | cpe:2.3:a:darwin:darwin:9.1:*:*:*:*:*:*:* |
| navision | financials_server | 3.0 | cpe:2.3:a:navision:financials_server:3.0:*:*:*:*:*:*:* |