CVE-2021-3521 (GCVE-0-2021-3521)
Vulnerability from cvelistv5
Published
2022-08-22 00:00
Modified
2024-08-03 17:01
Severity ?
CWE
  • CWE-347 - - Improper Verification of Cryptographic Signature
Summary
There is a flaw in RPM's signature functionality. OpenPGP subkeys are associated with a primary key via a "binding signature." RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository or convince an administrator to install an untrusted RPM or public key. It is strongly recommended to only use RPMs and public keys from trusted sources.
References
Impacted products
Vendor Product Version
n/a RPM Version: Fixed in rpm-4.18.0-beta1, rpm-4.18.0-alpha2, rpm-4.18.0-alpha1 .
Show details on NVD website

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  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T17:01:07.975Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
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            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1941098"
          },
          {
            "tags": [
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            ],
            "url": "https://access.redhat.com/security/cve/CVE-2021-3521"
          },
          {
            "tags": [
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            "url": "https://github.com/rpm-software-management/rpm/pull/1795/"
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          {
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            "url": "https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8"
          },
          {
            "name": "GLSA-202210-22",
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              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202210-22"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "RPM",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in rpm-4.18.0-beta1, rpm-4.18.0-alpha2, rpm-4.18.0-alpha1 ."
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "There is a flaw in RPM\u0027s signature functionality. OpenPGP subkeys are associated with a primary key via a \"binding signature.\" RPM does not check the binding signature of subkeys prior to importing them. If an attacker is able to add or socially engineer another party to add a malicious subkey to a legitimate public key, RPM could wrongly trust a malicious signature. The greatest impact of this flaw is to data integrity. To exploit this flaw, an attacker must either compromise an RPM repository or convince an administrator to install an untrusted RPM or public key. It is strongly recommended to only use RPMs and public keys from trusted sources."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347 - Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-10-31T00:00:00.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
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      "references": [
        {
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1941098"
        },
        {
          "url": "https://access.redhat.com/security/cve/CVE-2021-3521"
        },
        {
          "url": "https://github.com/rpm-software-management/rpm/pull/1795/"
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          "url": "https://security.gentoo.org/glsa/202210-22"
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  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-3521",
    "datePublished": "2022-08-22T00:00:00.000Z",
    "dateReserved": "2021-04-28T00:00:00.000Z",
    "dateUpdated": "2024-08-03T17:01:07.975Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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