cve-2021-3521
Vulnerability from cvelistv5
Published
2022-08-22 00:00
Modified
2024-08-03 17:01
Severity ?
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
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2021-3521Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1941098Issue Tracking, Patch, Third Party Advisory
secalert@redhat.comhttps://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8Patch, Third Party Advisory
secalert@redhat.comhttps://github.com/rpm-software-management/rpm/pull/1795/Patch, Third Party Advisory
secalert@redhat.comhttps://security.gentoo.org/glsa/202210-22Third Party Advisory
Impacted products
n/aRPM
Show details on NVD website

To clipboard 

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          "dateUpdated": "2024-08-03T17:01:07.975Z",
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            "url": "https://access.redhat.com/security/cve/CVE-2021-3521"
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            "url": "https://github.com/rpm-software-management/rpm/pull/1795/"
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            "url": "https://github.com/rpm-software-management/rpm/commit/bd36c5dc9fb6d90c46fbfed8c2d67516fc571ec8"
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        ],
        "title": "CVE Program Container"
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    ],
    "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 ."
            }
          ]
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      "descriptions": [
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          "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": [
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              "description": "CWE-347 - Improper Verification of Cryptographic Signature",
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        "dateUpdated": "2022-10-31T00:00:00",
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    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2021-3521",
    "datePublished": "2022-08-22T00:00:00",
    "dateReserved": "2021-04-28T00:00:00",
    "dateUpdated": "2024-08-03T17:01:07.975Z",
    "state": "PUBLISHED"
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  }
}


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