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

Vulnerability from cvelistv5 – Published: 2025-09-20 12:31 – Updated: 2025-09-22 17:27
VLAI
Title
Starch versions 0.14 and earlier generate session ids insecurely
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.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-09-22 16:57 UTC
CWE
  • CWE-340 - Generation of Predictable Numbers or Identifiers
  • CWE-338 - Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)
Assigner
CPANSec CNA under the redhat root
CNA scorecard C 64/100 over 265 records in the last 180 days details
Impacted products
Vendor Product Version CPE status
BLUEFEET Starch Affected: 0.01 , ≤ 0.14 (custom)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "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",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-40925",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-22T16:57:53.410409Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-09-22T17:27:16.336Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://cpan.org/modules",
          "defaultStatus": "unaffected",
          "packageName": "Starch",
          "product": "Starch",
          "programFiles": [
            "lib/Starch/Manager.pm"
          ],
          "repo": "https://github.com/bluefeet/Starch",
          "vendor": "BLUEFEET",
          "versions": [
            {
              "lessThanOrEqual": "0.14",
              "status": "affected",
              "version": "0.01",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cdiv\u003eStarch versions 0.14 and earlier generate session ids insecurely.\u003c/div\u003e\u003cdiv\u003eThe default session id generator returns a SHA-1 hash seeded with a counter, the epoch time,\u0026nbsp;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.\u003c/div\u003e\u003cdiv\u003ePredicable session ids could allow an attacker to gain access to systems.\u003c/div\u003e"
            }
          ],
          "value": "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."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-115",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-115 Authentication Bypass"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-340",
              "description": "CWE-340 Generation of Predictable Numbers or Identifiers",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-338",
              "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-20T12:31:34.353Z",
        "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "shortName": "CPANSec"
      },
      "references": [
        {
          "url": "https://github.com/bluefeet/Starch/pull/5"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/bluefeet/Starch/commit/5573449e64e0660f7ee209d1eab5881d4ccbee3b.patch"
        },
        {
          "url": "https://metacpan.org/dist/Starch/source/lib/Starch/Manager.pm"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Starch versions 0.14 and earlier generate session ids insecurely",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
    "assignerShortName": "CPANSec",
    "cveId": "CVE-2025-40925",
    "datePublished": "2025-09-20T12:31:34.353Z",
    "dateReserved": "2025-04-16T09:05:34.362Z",
    "dateUpdated": "2025-09-22T17:27:16.336Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-40925",
      "date": "2026-10-15",
      "epss": "0.0036",
      "percentile": "0.28127"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://cpan.org/modules",
                "defaultStatus": "unaffected",
                "packageName": "Starch",
                "product": "Starch",
                "programFiles": [
                  "lib/Starch/Manager.pm"
                ],
                "repo": "https://github.com/bluefeet/Starch",
                "vendor": "BLUEFEET",
                "versions": [
                  {
                    "lessThanOrEqual": "0.14",
                    "status": "affected",
                    "version": "0.01",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "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": "CVE-2025-40925",
        "lastModified": "2026-06-17T09:22:18.230",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "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",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.2,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2025-40925",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-09-22T16:57:53.410409Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-09-20T13:15:34.920",
        "references": [
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/bluefeet/Starch/commit/5573449e64e0660f7ee209d1eab5881d4ccbee3b.patch"
          },
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://github.com/bluefeet/Starch/pull/5"
          },
          {
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "url": "https://metacpan.org/dist/Starch/source/lib/Starch/Manager.pm"
          }
        ],
        "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-338"
              },
              {
                "lang": "en",
                "value": "CWE-340"
              }
            ],
            "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-01-09T10:58:00+00:00",
      "cve": "CVE-2025-40925",
      "id": "CVE-2025-40925",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Starch versions 0.14 and earlier generate session ids insecurely",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40925.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "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",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2025-40925",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-09-22T16:57:53.410409Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-09-22T16:57:57.286Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "collectionURL": "https://cpan.org/modules",
              "defaultStatus": "unaffected",
              "packageName": "Starch",
              "product": "Starch",
              "programFiles": [
                "lib/Starch/Manager.pm"
              ],
              "repo": "https://github.com/bluefeet/Starch",
              "vendor": "BLUEFEET",
              "versions": [
                {
                  "lessThanOrEqual": "0.14",
                  "status": "affected",
                  "version": "0.01",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cdiv\u003eStarch versions 0.14 and earlier generate session ids insecurely.\u003c/div\u003e\u003cdiv\u003eThe default session id generator returns a SHA-1 hash seeded with a counter, the epoch time,\u0026nbsp;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.\u003c/div\u003e\u003cdiv\u003ePredicable session ids could allow an attacker to gain access to systems.\u003c/div\u003e"
                }
              ],
              "value": "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."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-115",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-115 Authentication Bypass"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-340",
                  "description": "CWE-340 Generation of Predictable Numbers or Identifiers",
                  "lang": "en",
                  "type": "CWE"
                },
                {
                  "cweId": "CWE-338",
                  "description": "CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-09-20T12:31:34.353Z",
            "orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
            "shortName": "CPANSec"
          },
          "references": [
            {
              "url": "https://github.com/bluefeet/Starch/pull/5"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/bluefeet/Starch/commit/5573449e64e0660f7ee209d1eab5881d4ccbee3b.patch"
            },
            {
              "url": "https://metacpan.org/dist/Starch/source/lib/Starch/Manager.pm"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "Starch versions 0.14 and earlier generate session ids insecurely",
          "x_generator": {
            "engine": "Vulnogram 0.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e",
        "assignerShortName": "CPANSec",
        "cveId": "CVE-2025-40925",
        "datePublished": "2025-09-20T12:31:34.353Z",
        "dateReserved": "2025-04-16T09:05:34.362Z",
        "dateUpdated": "2025-09-22T17:27:16.336Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
Events included in the timeline

Loading timeline…


    Loading…

    Loading…

    Loading…

    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.