Vulnerability-Lookup

GHSA-M3R5-HC33-P4WF

Vulnerability from github – Published: 2026-08-20 21:31 – Updated: 2026-08-20 21:31

Details

A security flaw has been discovered in lin-snow Ech0 up to 5.4.1. Affected by this issue is the function MD5Encrypt of the file internal/util/crypto/crypto.go. Performing a manipulation results in risky cryptographic algorithm. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 5.4.2 can resolve this issue. The patch is named 9ce19a3b0d0765086a655f45d3a706ec1810404f. It is recommended to upgrade the affected component.

Severity

3.7 (Low)


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

6.3 (Medium)


                  
                    CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-77151"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-20T20:17:47Z",
    "severity": "MODERATE"
  },
  "details": "A security flaw has been discovered in lin-snow Ech0 up to 5.4.1. Affected by this issue is the function MD5Encrypt of the file internal/util/crypto/crypto.go. Performing a manipulation results in risky cryptographic algorithm. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 5.4.2 can resolve this issue. The patch is named 9ce19a3b0d0765086a655f45d3a706ec1810404f. It is recommended to upgrade the affected component.",
  "id": "GHSA-m3r5-hc33-p4wf",
  "modified": "2026-08-20T21:31:29Z",
  "published": "2026-08-20T21:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77151"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lin-snow/Ech0/issues/314"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lin-snow/Ech0/pull/315"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lin-snow/Ech0/commit/9ce19a3b0d0765086a655f45d3a706ec1810404f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lin-snow/Ech0"
    },
    {
      "type": "WEB",
      "url": "https://github.com/lin-snow/Ech0/releases/tag/ech0-5.4.2"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-77151"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/881015"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/393736"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/393736/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-77151 (GCVE-0-2026-77151)

Vulnerability from cvelistv5 – Published: 2026-08-20 19:45 – Updated: 2026-08-21 21:45 X_Open Source

Title

lin-snow Ech0 crypto.go MD5Encrypt risky encryption

Summary

Severity

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X

3.7 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

3.7 (Low)


                        
                          CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 21:40 UTC

CWE

CWE-327 - Risky Cryptographic Algorithm
CWE-310 - Cryptographic Issues

Assigner

VulDB mitre root

References

9 references

URL	Tags
https://vuldb.com/vuln/393736	vdb-entrytechnical-description
https://vuldb.com/vuln/393736/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-77151	third-party-advisory
https://vuldb.com/submit/881015	third-party-advisory
https://github.com/lin-snow/Ech0/issues/314	issue-tracking
https://github.com/lin-snow/Ech0/pull/315	issue-trackingpatch
https://github.com/lin-snow/Ech0/commit/9ce19a3b0…	patch
https://github.com/lin-snow/Ech0/releases/tag/ech…	patch
https://github.com/lin-snow/Ech0/	product

Impacted products

1 product

Vendor	Product	Version
lin-snow	Ech0	Affected: 5.4.0 Affected: 5.4.1 Unaffected: 5.4.2 cpe:2.3:a:lin-snow:ech0::::::::

Credits

summmm (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77151",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-21T21:40:02.592941Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-21T21:45:57.804Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:lin-snow:ech0:*:*:*:*:*:*:*:*"
          ],
          "product": "Ech0",
          "vendor": "lin-snow",
          "versions": [
            {
              "status": "affected",
              "version": "5.4.0"
            },
            {
              "status": "affected",
              "version": "5.4.1"
            },
            {
              "status": "unaffected",
              "version": "5.4.2"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "summmm (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A security flaw has been discovered in lin-snow Ech0 up to 5.4.1. Affected by this issue is the function MD5Encrypt of the file internal/util/crypto/crypto.go. Performing a manipulation results in risky cryptographic algorithm. Remote exploitation of the attack is possible. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 5.4.2 can resolve this issue. The patch is named 9ce19a3b0d0765086a655f45d3a706ec1810404f. It is recommended to upgrade the affected component."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 3.7,
            "baseSeverity": "LOW",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:O/RC:C",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 2.6,
            "vectorString": "AV:N/AC:H/Au:N/C:P/I:N/A:N/E:ND/RL:OF/RC:C",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-327",
              "description": "Risky Cryptographic Algorithm",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-310",
              "description": "Cryptographic Issues",
              "lang": "en",
              "type": "CWE"
            }
          ]
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      "providerMetadata": {
        "dateUpdated": "2026-08-20T19:45:10.732Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-393736 | lin-snow Ech0 crypto.go MD5Encrypt risky encryption",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/vuln/393736"
        },
        {
          "name": "VDB-393736 | CTI Indicators (IOB, IOC, TTP, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/vuln/393736/cti"
        },
        {
          "name": "CVE-2026-77151 | CVE Analysis and Report",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/cve/CVE-2026-77151"
        },
        {
          "name": "Submit #881015 | lin-snow Ech0 5.4.1 Unsalted MD5 Password Hashing in Ech0 Enables Mass Credential Cr",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/submit/881015"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/lin-snow/Ech0/issues/314"
        },
        {
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/lin-snow/Ech0/pull/315"
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          "tags": [
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          "url": "https://github.com/lin-snow/Ech0/commit/9ce19a3b0d0765086a655f45d3a706ec1810404f"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/lin-snow/Ech0/releases/tag/ech0-5.4.2"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/lin-snow/Ech0/"
        }
      ],
      "tags": [
        "x_open-source"
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-08-20T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2026-08-20T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2026-08-20T16:03:16.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "lin-snow Ech0 crypto.go MD5Encrypt risky encryption",
      "x_generator": [
        "VulDB PVTS v202608"
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2026-77151",
    "datePublished": "2026-08-20T19:45:10.732Z",
    "dateReserved": "2026-08-20T13:57:41.826Z",
    "dateUpdated": "2026-08-21T21:45:57.804Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-M3R5-HC33-P4WF

CVE-2026-77151 (GCVE-0-2026-77151)

Tags

Sightings

Nomenclature

Related by attack behaviour