rhsa-2010_0838
Vulnerability from csaf_redhat
Published
2010-11-08 20:09
Modified
2024-11-22 03:45
Summary
Red Hat Security Advisory: pki security and enhancement update

Notes

Topic
Updated pki-ca, pki-util, and pki-common packages that fix three security issues and add several enhancements are now available for Red Hat Certificate System 8. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
Red Hat Certificate System is an enterprise software system designed to manage enterprise public key infrastructure (PKI) deployments. Simple Certificate Enrollment Protocol (SCEP) is a PKI communication protocol used to automatically enroll certificates for network devices. The certificate authority allowed unauthenticated users to request the one-time PIN in an SCEP request to be decrypted. An attacker able to sniff an SCEP request from a network device could request the certificate authority to decrypt the request, allowing them to obtain the one-time PIN. With this update, the certificate authority only handles decryption requests from authenticated registration authorities. (CVE-2010-3868) The certificate authority allowed the one-time PIN used in SCEP requests to be re-used. An attacker possessing a valid SCEP enrollment one-time PIN could use it to generate an unlimited number of certificates. (CVE-2010-3869) The certificate authority used the MD5 hash algorithm to sign all SCEP protocol responses. As MD5 is not collision resistant, an attacker could use this flaw to perform an MD5 chosen-prefix collision attack to generate attack-chosen output signed using the certificate authority's key. (CVE-2004-2761) This update also adds the following enhancements: * New configuration options for the SCEP server can define the default and allowed encryption and hash algorithms. These options allow disabling uses of the weaker algorithms not required by network devices and prevent possible downgrade attacks. These can be configured by adding the following options to the certificate authority's CS.cfg configuration file: ca.scep.encryptionAlgorithm=DES3 ca.scep.allowedEncryptionAlgorithms=DES3 ca.scep.hashAlgorithm=SHA1 ca.scep.allowedHashAlgorithms=SHA1,SHA256,SHA512 * With this update, the certificate authority's SCEP server is disabled by default. The SCEP server can be enabled by adding the 'ca.scep.enable=true' option to the certificate authority's CS.cfg configuration file. * A separate key pair can now be configured for use in SCEP communication. Previously, the main certificate authority's key pair was used for SCEP communication too. A designated SCEP key pair can be referenced by adding a new option, ca.scep.nickname=[scep certificate nickname], to the certificate authority's CS.cfg configuration file. * The certificate authority now allows the size of nonces used in SCEP requests to be restricted by adding a new option, ca.scep.nonceSizeLimit= [number of bytes], to the certificate authority's CS.cfg configuration file. The limit is set to 16 bytes in the default CS.cfg configuration file. All users of Red Hat Certificate System 8 should upgrade to these updated packages, which resolve these issues and add these enhancements.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.


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{
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      "text": "Moderate"
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    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
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      {
        "category": "summary",
        "text": "Updated pki-ca, pki-util, and pki-common packages that fix three security\nissues and add several enhancements are now available for Red Hat\nCertificate System 8.\n\nThe Red Hat Security Response Team has rated this update as having moderate\nsecurity impact. Common Vulnerability Scoring System (CVSS) base scores,\nwhich give detailed severity ratings, are available for each vulnerability\nfrom the CVE links in the References section.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Red Hat Certificate System is an enterprise software system designed to\nmanage enterprise public key infrastructure (PKI) deployments. Simple\nCertificate Enrollment Protocol (SCEP) is a PKI communication protocol\nused to automatically enroll certificates for network devices.\n\nThe certificate authority allowed unauthenticated users to request the\none-time PIN in an SCEP request to be decrypted. An attacker able to sniff\nan SCEP request from a network device could request the certificate\nauthority to decrypt the request, allowing them to obtain the one-time\nPIN. With this update, the certificate authority only handles decryption\nrequests from authenticated registration authorities. (CVE-2010-3868)\n\nThe certificate authority allowed the one-time PIN used in SCEP requests\nto be re-used. An attacker possessing a valid SCEP enrollment one-time PIN\ncould use it to generate an unlimited number of certificates.\n(CVE-2010-3869)\n\nThe certificate authority used the MD5 hash algorithm to sign all SCEP\nprotocol responses. As MD5 is not collision resistant, an attacker could\nuse this flaw to perform an MD5 chosen-prefix collision attack to generate\nattack-chosen output signed using the certificate authority\u0027s key.\n(CVE-2004-2761)\n\nThis update also adds the following enhancements:\n\n* New configuration options for the SCEP server can define the default and\nallowed encryption and hash algorithms. These options allow disabling uses\nof the weaker algorithms not required by network devices and prevent\npossible downgrade attacks. These can be configured by adding the following\noptions to the certificate authority\u0027s CS.cfg configuration file:\n\n   ca.scep.encryptionAlgorithm=DES3\n   ca.scep.allowedEncryptionAlgorithms=DES3\n   ca.scep.hashAlgorithm=SHA1\n   ca.scep.allowedHashAlgorithms=SHA1,SHA256,SHA512\n\n* With this update, the certificate authority\u0027s SCEP server is disabled by\ndefault. The SCEP server can be enabled by adding the \u0027ca.scep.enable=true\u0027\noption to the certificate authority\u0027s CS.cfg configuration file.\n\n* A separate key pair can now be configured for use in SCEP communication.\nPreviously, the main certificate authority\u0027s key pair was used for SCEP\ncommunication too. A designated SCEP key pair can be referenced by adding\na new option, ca.scep.nickname=[scep certificate nickname], to the\ncertificate authority\u0027s CS.cfg configuration file.\n\n* The certificate authority now allows the size of nonces used in SCEP\nrequests to be restricted by adding a new option, ca.scep.nonceSizeLimit=\n[number of bytes], to the certificate authority\u0027s CS.cfg configuration\nfile. The limit is set to 16 bytes in the default CS.cfg configuration\nfile.\n\nAll users of Red Hat Certificate System 8 should upgrade to these updated\npackages, which resolve these issues and add these enhancements.",
        "title": "Details"
      },
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
        "title": "Terms of Use"
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2010/rhsa-2010_0838.json"
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    "title": "Red Hat Security Advisory: pki security and enhancement update",
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  "vulnerabilities": [
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      "cve": "CVE-2004-2761",
      "discovery_date": "2008-12-30T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "648886"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The MD5 Message-Digest Algorithm is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of MD5 in the signature algorithm of an X.509 certificate.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "MD5: MD5 Message-Digest Algorithm is not collision resistant",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Please see https://access.redhat.com/solutions/15378",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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          "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
          "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
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          "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
          "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
          "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
          "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2004-2761"
        },
        {
          "category": "external",
          "summary": "RHBZ#648886",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=648886"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2004-2761",
          "url": "https://www.cve.org/CVERecord?id=CVE-2004-2761"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2004-2761",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2004-2761"
        }
      ],
      "release_date": "2008-12-30T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2010-11-08T20:09:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259",
          "product_ids": [
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            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
            "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
            "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2010:0838"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
            "version": "2.0"
          },
          "products": [
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
            "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
            "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "MD5: MD5 Message-Digest Algorithm is not collision resistant"
    },
    {
      "cve": "CVE-2010-3868",
      "discovery_date": "2008-11-10T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "648882"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Red Hat Certificate System (RHCS) 7.3 and 8 and Dogtag Certificate System do not require authentication for requests to decrypt SCEP one-time PINs, which allows remote attackers to obtain PINs by sniffing the network for SCEP requests and then sending decryption requests to the Certificate Authority component.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "System: unauthenticated user can request SCEP one-time PIN decryption",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
          "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
          "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
          "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
          "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
          "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
          "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
          "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2010-3868"
        },
        {
          "category": "external",
          "summary": "RHBZ#648882",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=648882"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2010-3868",
          "url": "https://www.cve.org/CVERecord?id=CVE-2010-3868"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2010-3868",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-3868"
        }
      ],
      "release_date": "2010-11-08T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2010-11-08T20:09:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259",
          "product_ids": [
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
            "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
            "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2010:0838"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:H/Au:N/C:P/I:P/A:N",
            "version": "2.0"
          },
          "products": [
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
            "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
            "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "System: unauthenticated user can request SCEP one-time PIN decryption"
    },
    {
      "cve": "CVE-2010-3869",
      "discovery_date": "2008-11-10T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "648883"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Red Hat Certificate System (RHCS) 7.3 and 8 and Dogtag Certificate System allow remote authenticated users to generate an arbitrary number of certificates by replaying a single SCEP one-time PIN.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "System: SCEP one-time PIN reuse",
          "title": "Vulnerability summary"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
          "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
          "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
          "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
          "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
          "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
          "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
          "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2010-3869"
        },
        {
          "category": "external",
          "summary": "RHBZ#648883",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=648883"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2010-3869",
          "url": "https://www.cve.org/CVERecord?id=CVE-2010-3869"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2010-3869",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2010-3869"
        }
      ],
      "release_date": "2010-11-08T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2010-11-08T20:09:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/docs/DOC-11259",
          "product_ids": [
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
            "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
            "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2010:0838"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "NONE",
            "baseScore": 4.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
            "version": "2.0"
          },
          "products": [
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-ca-0:8.0.7-1.el5pki.src",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-common-0:8.0.6-2.el5pki.src",
            "5Server-RHCertSystem:pki-common-javadoc-0:8.0.6-2.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.noarch",
            "5Server-RHCertSystem:pki-util-0:8.0.5-1.el5pki.src",
            "5Server-RHCertSystem:pki-util-javadoc-0:8.0.5-1.el5pki.noarch"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "System: SCEP one-time PIN reuse"
    }
  ]
}


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