github - ghsa-w8xv-rwgf-4fwh

GHSA-W8XV-RWGF-4FWH

Vulnerability from github – Published: 2025-01-14 16:32 – Updated: 2025-01-15 15:26

Summary

CVE-2025-0343: Swift ASN.1 can crash when parsing maliciously formed BER/DER

Details

Importantly, these constraints are actually required to be true in DER, but that correctness wasn't enforced on the early node parser side so it was incorrect to rely on it later on in decoding, which is what the library did.

These crashes can be triggered when parsing any DER/BER format object. There is no memory-safety issue here: the crash is a graceful one from the Swift runtime. The impact of this is that it can be used as a denial-of-service vector when parsing BER/DER data from unknown sources, e.g. when parsing TLS certificates.

Many thanks to @baarde for reporting this issue and providing the fix.

Show details on source website

JSON

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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.3.0"
      },
      "package": {
        "ecosystem": "SwiftURL",
        "name": "github.com/apple/swift-asn1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-0343"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-228"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-01-14T16:32:07Z",
    "nvd_published_at": "2025-01-15T01:15:13Z",
    "severity": "LOW"
  },
  "details": "Swift ASN.1 can be caused to crash when parsing certain BER/DER constructions. This crash is caused by a confusion in the ASN.1 library itself which assumes that certain objects can only be provided in either constructed or primitive forms, and will trigger a `preconditionFailure` if that constraint isn\u0027t met.\n\nImportantly, these constraints are actually required to be true in DER, but that correctness wasn\u0027t enforced on the early node parser side so it was incorrect to rely on it later on in decoding, which is what the library did.\n\nThese crashes can be triggered when parsing any DER/BER format object. There is no memory-safety issue here: the crash is a graceful one from the Swift runtime. The impact of this is that it can be used as a denial-of-service vector when parsing BER/DER data from unknown sources, e.g. when parsing TLS certificates.\n\nMany thanks to @baarde for reporting this issue and providing the fix.",
  "id": "GHSA-w8xv-rwgf-4fwh",
  "modified": "2025-01-15T15:26:01Z",
  "published": "2025-01-14T16:32:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/apple/swift-asn1/security/advisories/GHSA-w8xv-rwgf-4fwh"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-0343"
    },
    {
      "type": "WEB",
      "url": "https://github.com/apple/swift-asn1/commit/ae33e5941bb88d88538d0a6b19ca0b01e6c76dcf"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/apple/swift-asn1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "CVE-2025-0343: Swift ASN.1 can crash when parsing maliciously formed BER/DER"
}

CVE-2025-0343 (GCVE-0-2025-0343)

Vulnerability from cvelistv5 – Published: 2025-01-15 00:48 – Updated: 2025-03-24 16:07

Summary

Swift ASN.1 can be caused to crash when parsing certain BER/DER constructions. This crash is caused by a confusion in the ASN.1 library itself which assumes that certain objects can only be provided in either constructed or primitive forms, and will trigger a preconditionFailure if that constraint isn't met. Importantly, these constraints are actually required to be true in DER, but that correctness wasn't enforced on the early node parser side so it was incorrect to rely on it later on in decoding, which is what the library did. These crashes can be triggered when parsing any DER/BER format object. There is no memory-safety issue here: the crash is a graceful one from the Swift runtime. The impact of this is that it can be used as a denial-of-service vector when parsing BER/DER data from unknown sources, e.g. when parsing TLS certificates.

Severity ?

7.5 (High)


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

CWE

CWE-228 - Improper Handling of Syntactically Invalid Structure

Assigner

Swift

References

URL

Tags

https://github.com/apple/swift-asn1/security/advi…

Impacted products

	Vendor	Product	Version
	Swift Project	Swift ASN1	Affected: 1.0.0 , < 1.3.1 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2025-0343",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-01-15T14:55:10.749413Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-228",
                "description": "CWE-228 Improper Handling of Syntactically Invalid Structure",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-03-24T16:07:03.833Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Swift ASN1",
          "vendor": "Swift Project",
          "versions": [
            {
              "lessThan": "1.3.1",
              "status": "affected",
              "version": "1.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Swift ASN.1 can be caused to crash when parsing certain BER/DER constructions. This crash is caused by a confusion in the ASN.1 library itself which assumes that certain objects can only be provided in either constructed or primitive forms, and will trigger a preconditionFailure if that constraint isn\u0027t met.\n\nImportantly, these constraints are actually required to be true in DER, but that correctness wasn\u0027t enforced on the early node parser side so it was incorrect to rely on it later on in decoding, which is what the library did.\n\nThese crashes can be triggered when parsing any DER/BER format object. There is no memory-safety issue here: the crash is a graceful one from the Swift runtime. The impact of this is that it can be used as a denial-of-service vector when parsing BER/DER data from unknown sources, e.g. when parsing TLS certificates."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-228: Improper Handling of Syntactically Invalid Structure",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-01-15T00:48:07.959Z",
        "orgId": "e4a1ddda-f4f5-496e-96c8-82c37d06abd0",
        "shortName": "Swift"
      },
      "references": [
        {
          "url": "https://github.com/apple/swift-asn1/security/advisories/GHSA-w8xv-rwgf-4fwh"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "e4a1ddda-f4f5-496e-96c8-82c37d06abd0",
    "assignerShortName": "Swift",
    "cveId": "CVE-2025-0343",
    "datePublished": "2025-01-15T00:48:07.959Z",
    "dateReserved": "2025-01-08T18:27:05.903Z",
    "dateUpdated": "2025-03-24T16:07:03.833Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-W8XV-RWGF-4FWH

CVE-2025-0343 (GCVE-0-2025-0343)

Tags

Sightings

Nomenclature