FKIE_CVE-2021-37845

Vulnerability from fkie_nvd - Published: 2023-05-29 19:15 - Updated: 2026-06-17 04:01
Severity
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
3.7 (Low) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
An issue was discovered in Citadel through webcit-932. A meddler-in-the-middle attacker can fixate their own session during the cleartext phase before a STARTTLS command (a violation of "The STARTTLS command is only valid in non-authenticated state." in RFC2595). This potentially allows an attacker to cause a victim's e-mail messages to be stored into an attacker's IMAP mailbox, but depends on details of the victim's client behavior.
References
cve@mitre.orghttp://uncensored.citadel.org/dotgoto?room=Citadel%20SecurityIssue Tracking
cve@mitre.orghttps://nostarttls.secvuln.info/Broken Link
cve@mitre.orghttps://uncensored.citadel.org/msg/2099264259Exploit
af854a3a-2127-422b-91ae-364da2661108http://uncensored.citadel.org/dotgoto?room=Citadel%20SecurityIssue Tracking
af854a3a-2127-422b-91ae-364da2661108https://nostarttls.secvuln.info/Broken Link
af854a3a-2127-422b-91ae-364da2661108https://uncensored.citadel.org/msg/2099264259Exploit
Impacted products
Vendor Product Version
citadel webcit *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:citadel:webcit:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5F971CB1-1AF3-4C89-9E56-3D73F64FF33F",
              "versionEndIncluding": "932",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in Citadel through webcit-932. A meddler-in-the-middle attacker can fixate their own session during the cleartext phase before a STARTTLS command (a violation of \"The STARTTLS command is only valid in non-authenticated state.\" in RFC2595). This potentially allows an attacker to cause a victim\u0027s e-mail messages to be stored into an attacker\u0027s IMAP mailbox, but depends on details of the victim\u0027s client behavior."
    }
  ],
  "id": "CVE-2021-37845",
  "lastModified": "2026-06-17T04:01:11.643",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-37845",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-01-14T17:46:27.774902Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-05-29T19:15:09.527",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "http://uncensored.citadel.org/dotgoto?room=Citadel%20Security"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Broken Link"
      ],
      "url": "https://nostarttls.secvuln.info/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit"
      ],
      "url": "https://uncensored.citadel.org/msg/2099264259"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking"
      ],
      "url": "http://uncensored.citadel.org/dotgoto?room=Citadel%20Security"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Broken Link"
      ],
      "url": "https://nostarttls.secvuln.info/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit"
      ],
      "url": "https://uncensored.citadel.org/msg/2099264259"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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