{
    "document": {
        "category": "csaf_base",
        "csaf_version": "2.0",
        "distribution": {
            "tlp": {
                "label": "WHITE"
            }
        },
        "lang": "en",
        "notes": [
            {
                "category": "legal_disclaimer",
                "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings."
            }
        ],
        "publisher": {
            "category": "coordinator",
            "contact_details": "cert@ncsc.nl",
            "name": "National Cyber Security Centre",
            "namespace": "https://www.ncsc.nl/"
        },
        "title": "CVE-2025-15604",
        "tracking": {
            "current_release_date": "2026-04-01T16:26:02.046605Z",
            "generator": {
                "date": "2026-02-17T15:00:00Z",
                "engine": {
                    "name": "V.E.L.M.A",
                    "version": "1.7"
                }
            },
            "id": "CVE-2025-15604",
            "initial_release_date": "2026-03-28T19:24:48.266233Z",
            "revision_history": [
                {
                    "date": "2026-03-28T19:24:48.266233Z",
                    "number": "1",
                    "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-03-28T19:24:57.628005Z",
                    "number": "2",
                    "summary": "NCSC Score created."
                },
                {
                    "date": "2026-03-28T19:38:42.553525Z",
                    "number": "3",
                    "summary": "Source created.| CVE status created. (valid)| Description created for source.| Products created (1).| References created (4).| CWES updated (1)."
                },
                {
                    "date": "2026-03-28T19:38:47.108844Z",
                    "number": "4",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-28T20:38:27.523416Z",
                    "number": "5",
                    "summary": "References created (1)."
                },
                {
                    "date": "2026-03-28T21:24:36.148928Z",
                    "number": "6",
                    "summary": "References created (1)."
                },
                {
                    "date": "2026-03-29T07:34:41.414877Z",
                    "number": "7",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-29T23:39:29.638522Z",
                    "number": "8",
                    "summary": "Source connected.| CVE status created. (valid)| EPSS created."
                },
                {
                    "date": "2026-03-29T23:39:38.336289Z",
                    "number": "9",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-03-31T21:25:50.247601Z",
                    "number": "10",
                    "summary": "CVSS created.| Products created (1).| Product Identifiers created (1)."
                },
                {
                    "date": "2026-03-31T21:25:53.712196Z",
                    "number": "11",
                    "summary": "NCSC Score updated."
                },
                {
                    "date": "2026-04-01T15:39:03.665094Z",
                    "number": "12",
                    "summary": "CVSS created.| Unknown change."
                },
                {
                    "date": "2026-04-01T15:39:05.375853Z",
                    "number": "13",
                    "summary": "NCSC Score updated."
                }
            ],
            "status": "interim",
            "version": "13"
        }
    },
    "product_tree": {
        "branches": [
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<6.17",
                                "product": {
                                    "name": "vers:unknown/<6.17",
                                    "product_id": "CSAFPID-5958893"
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "Amon2"
                    }
                ],
                "category": "vendor",
                "name": "TOKUHIROM"
            },
            {
                "branches": [
                    {
                        "branches": [
                            {
                                "category": "product_version_range",
                                "name": "vers:unknown/<6.17",
                                "product": {
                                    "name": "vers:unknown/<6.17",
                                    "product_id": "CSAFPID-5969609",
                                    "product_identification_helper": {
                                        "cpe": "cpe:2.3:a:tokuhirom:amon2:*:*:*:*:*:perl:*:*"
                                    }
                                }
                            }
                        ],
                        "category": "product_name",
                        "name": "amon2"
                    }
                ],
                "category": "vendor",
                "name": "tokuhirom"
            }
        ]
    },
    "vulnerabilities": [
        {
            "cve": "CVE-2025-15604",
            "cwe": {
                "id": "CWE-338",
                "name": "Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"
            },
            "notes": [
                {
                    "category": "description",
                    "text": "Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions.\n\nIn versions 6.06 through 6.16, the random_string function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes by concatenating a 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.\n\nBefore version 6.06, there was no fallback when /dev/urandom was not available.\n\nBefore version 6.04, the random_string function used the built-in rand() function to generate a mixed-case alphanumeric string.\n\nThis function may be used for generating session ids, generating secrets for signing or encrypting cookie session data and generating tokens used for Cross Site Request Forgery (CSRF) protection.",
                    "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-15604"
                },
                {
                    "category": "description",
                    "text": "Amon2 versions before 6.17 for Perl use an insecure random_string implementation for security functions.\n\nIn versions 6.06 through 6.16, the random_string function will attempt to read bytes from the /dev/urandom device, but if that is unavailable then it generates bytes by concatenating a 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.\n\nBefore version 6.06, there was no fallback when /dev/urandom was not available.\n\nBefore version 6.04, the random_string function used the built-in rand() function to generate a mixed-case alphanumeric string.\n\nThis function may be used for generating session ids, generating secrets for signing or encrypting cookie session data and generating tokens used for Cross Site Request Forgery (CSRF) protection.",
                    "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/15xxx/CVE-2025-15604.json"
                },
                {
                    "category": "other",
                    "text": "0.00018",
                    "title": "EPSS"
                },
                {
                    "category": "other",
                    "text": "4.9",
                    "title": "NCSC Score"
                },
                {
                    "category": "other",
                    "text": "Is related to an uncommon cwe id",
                    "title": "NCSC Score top increasing factors"
                },
                {
                    "category": "other",
                    "text": "There is cwe data available from source Nvd",
                    "title": "NCSC Score top decreasing factors"
                }
            ],
            "product_status": {
                "known_affected": [
                    "CSAFPID-5958893",
                    "CSAFPID-5969609"
                ]
            },
            "references": [
                {
                    "category": "external",
                    "summary": "Source - nvd",
                    "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-15604"
                },
                {
                    "category": "external",
                    "summary": "Source - cveprojectv5",
                    "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/15xxx/CVE-2025-15604.json"
                },
                {
                    "category": "external",
                    "summary": "Source - first",
                    "url": "https://api.first.org/data/v1/epss?limit=10000&offset=40000"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://github.com/tokuhirom/Amon/pull/135"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://metacpan.org/release/TOKUHIROM/Amon2-6.17/changes"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://metacpan.org/release/TOKUHIROM/Amon2-6.17/diff/TOKUHIROM/Amon2-6.16#lib/Amon2/Util.pm"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "https://security.metacpan.org/docs/guides/random-data-for-security.html"
                },
                {
                    "category": "external",
                    "summary": "Reference - cveprojectv5; nvd",
                    "url": "http://www.openwall.com/lists/oss-security/2026/03/28/4"
                }
            ],
            "scores": [
                {
                    "cvss_v3": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "products": [
                        "CSAFPID-5958893",
                        "CSAFPID-5969609"
                    ]
                }
            ],
            "title": "CVE-2025-15604"
        }
    ]
}