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CVE-2024-27355

Status: AnalyzedHigh (7.5)—

An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a certificate, a sub identifier may be provided that leads to a denial of service (CPU consumption for decodeOID).

CVSS

Exploitation probability (EPSS)

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)

Debian — Debian LinuxPhpseclib — Phpseclib

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2024-27355",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-27355",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-08-09T14:10:07.399957Z"
        }
      }
    ],
    "cvssMetricV31": [
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        "type": "Secondary",
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        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
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        }
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    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "affectedData": [
        {
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          "vendor": "phpseclib",
          "product": "phpseclib",
          "versions": [
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              "version": "1.0",
              "lessThan": "1.0.23",
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            },
            {
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              "version": "2.0",
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              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "3.0",
              "lessThan": "3.0.36",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unknown"
        }
      ]
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  ],
  "published": "2024-03-01T23:15:08.553",
  "references": [
    {
      "url": "https://gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://github.com/phpseclib/phpseclib/blob/978d081fe50ff92879c50ff143c62a143edb0117/phpseclib/File/ASN1.php#L1129",
      "tags": [
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      "source": "cve@mitre.org"
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html",
      "tags": [
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      "source": "cve@mitre.org"
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    {
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      "tags": [
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      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://github.com/phpseclib/phpseclib/blob/978d081fe50ff92879c50ff143c62a143edb0117/phpseclib/File/ASN1.php#L1129",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2024/03/msg00002.html",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
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      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. When processing the ASN.1 object identifier of a certificate, a sub identifier may be provided that leads to a denial of service (CPU consumption for decodeOID)."
    },
    {
      "lang": "es",
      "value": "Se descubrió un problema en phpseclib 1.x anterior a 1.0.23, 2.x anterior a 2.0.47 y 3.x anterior a 3.0.36. Al procesar el identificador de objeto ASN.1 de un certificado, se puede proporcionar un subidentificador que conduzca a una denegación de servicio (consumo de CPU para decodeOID)."
    }
  ],
  "lastModified": "2026-06-17T07:19:43.123",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A566C1D0-4B65-4023-80A8-923CC0B656E5",
              "versionEndExcluding": "1.0.23",
              "versionStartIncluding": "1.0.0"
            },
            {
              "criteria": "cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*",
              "vulnerable": true,
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              "versionEndExcluding": "2.0.47",
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            },
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              "versionEndExcluding": "3.0.36",
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          "cpeMatch": [
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  "sourceIdentifier": "cve@mitre.org"
}