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CVE-2016-7143

Status: ModifiedHigh (8.1)—
Severity8.1High · CVSS 3.0
Exploitation probability1.06 %higher than 64% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

The m_authenticate function in modules/m_sasl.c in Charybdis before 3.5.3 allows remote attackers to spoof certificate fingerprints and consequently log in as another user via a crafted AUTHENTICATE parameter.

CVSS

Base score
8.1
Version
3.0
Vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
1.06 %
Percentile among all scored CVEs
64
Score date
10/24/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (2)

Charybdis Project — CharybdisDebian — Debian Linux

CWEs

References

Show 12 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2016-7143",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
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    "cvssMetricV30": [
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        "type": "Primary",
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        "cvssData": {
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          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.2
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
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        }
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  "published": "2016-09-21T14:25:26.177",
  "references": [
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      "url": "http://www.debian.org/security/2016/dsa-3661",
      "tags": [
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    {
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    {
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/charybdis-ircd/charybdis/blob/charybdis-3.5.3/NEWS.md",
      "tags": [
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        "Third Party Advisory"
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/charybdis-ircd/charybdis/commit/818a3fda944b26d4814132cee14cfda4ea4aa824",
      "tags": [
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    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://github.com/charybdis-ircd/charybdis/blob/charybdis-3.5.3/NEWS.md",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/charybdis-ircd/charybdis/commit/818a3fda944b26d4814132cee14cfda4ea4aa824",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-285"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The m_authenticate function in modules/m_sasl.c in Charybdis before 3.5.3 allows remote attackers to spoof certificate fingerprints and consequently log in as another user via a crafted AUTHENTICATE parameter."
    },
    {
      "lang": "es",
      "value": "La función m_authenticate en modules/m_sasl.c en Charybdis en versiones anteriores a 3.5.3 permite a atacantes remotos suplantar huellas dactilares de certificados y consecuentemente iniciar sesión como otro usuario a través de un parámetro AUTHENTICATE manipulado."
    }
  ],
  "lastModified": "2026-06-17T00:52:40.500",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43"
            }
          ],
          "operator": "OR"
        }
      ]
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    {
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        {
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          "cpeMatch": [
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              "versionEndIncluding": "3.5.2"
            }
          ],
          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "cve@mitre.org"
}