github - ghsa-q46q-p96m-rvh8

GHSA-Q46Q-P96M-RVH8

Vulnerability from github – Published: 2025-09-22 18:30 – Updated: 2025-09-22 18:30

Details

Starch versions 0.14 and earlier generate session ids insecurely.

The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. 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.

Severity ?

9.1 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40925"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-338"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-20T13:15:34Z",
    "severity": "CRITICAL"
  },
  "details": "Starch versions 0.14 and earlier generate session ids insecurely.\n\nThe default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. 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\nPredicable session ids could allow an attacker to gain access to systems.",
  "id": "GHSA-q46q-p96m-rvh8",
  "modified": "2025-09-22T18:30:34Z",
  "published": "2025-09-22T18:30:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40925"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bluefeet/Starch/pull/5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bluefeet/Starch/commit/5573449e64e0660f7ee209d1eab5881d4ccbee3b.patch"
    },
    {
      "type": "WEB",
      "url": "https://metacpan.org/dist/Starch/source/lib/Starch/Manager.pm"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-40925 (GCVE-0-2025-40925)

Vulnerability from cvelistv5 – Published: 2025-09-20 12:31 – Updated: 2025-09-22 17:27

Summary

Starch versions 0.14 and earlier generate session ids insecurely. The default session id generator returns a SHA-1 hash seeded with a counter, the epoch time, the built-in rand function, the PID, and internal Perl reference addresses. 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.

Severity ?

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CWE

CWE-340 - Generation of Predictable Numbers or Identifiers
CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

Assigner

CPANSec

References

URL

Tags

	https://github.com/bluefeet/Starch/pull/5
	https://github.com/bluefeet/Starch/commit/5573449…	patch
	https://metacpan.org/dist/Starch/source/lib/Starc…

Impacted products

	Vendor	Product	Version
	BLUEFEET	Starch	Affected: 0.01 , ≤ 0.14 (custom)

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JSON

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    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
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              "content": {
                "id": "CVE-2025-40925",
                "options": [
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                    "Exploitation": "none"
                  },
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-22T16:57:53.410409Z",
                "version": "2.0.3"
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
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          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
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          "repo": "https://github.com/bluefeet/Starch",
          "vendor": "BLUEFEET",
          "versions": [
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-Q46Q-P96M-RVH8

CVE-2025-40925 (GCVE-0-2025-40925)

Tags

Sightings

Nomenclature