rhsa-2003_205
Vulnerability from csaf_redhat
Published
2003-06-23 17:37
Modified
2024-11-21 22:43
Summary
Red Hat Security Advisory: : : : Updated OpenSSL packages fix vulnerabilities

Notes

Topic
Updated OpenSSL packages that fix potential timing-based and modified Bleichenbacher attacks are available for Red Hat Linux on IBM iSeries and pSeries systems.
Details
OpenSSL is a commercial-grade, full-featured, and open source toolkit that implements Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library. In a paper, Brice Canvel, Alain Hiltgen, Serge Vaudenay, and Martin Vuagnoux describe and demonstrate a timing-based attack on CBC ciphersuites in SSL and TLS. An active attacker may be able to use timing observations to distinguish between two different error cases: cipher padding errors and MAC verification errors. Over multiple connections this can leak sufficient information to make it possible to retrieve the plaintext of a common, fixed block. In order for an attack to be sucessful, an attacker must be able to act as a man-in-the-middle to intercept and modify multiple connections, which all involve a common fixed plaintext block (such as a password), and have good network conditions that allow small changes in timing to be reliably observed. Researchers discovered a timing attack on RSA keys. Applications making use of OpenSSL are generally vulnerable to such an attack, unless RSA blinding has been turned on. OpenSSL does not use RSA blinding by default and most applications do not enable RSA blinding. A local or remote attacker could use this attack to obtain the server's private key by determining factors using timing differences on (1) the number of extra reductions during Montgomery reduction, and (2) the use of different integer multiplication algorithms ("Karatsuba" and normal). In order for an attack to be sucessful, an attacker must have good network conditions allowing small changes in timing to be reliably observed. Additionally, the SSL and TLS components for OpenSSL allow remote attackers to perform an unauthorized RSA private key operation via a modified Bleichenbacher attack. This attack uses a large number of SSL or TLS connections, using PKCS #1 v1.5 padding, and causes OpenSSL to leak information regarding the relationship between ciphertext and the associated plaintext, aka the "Klima-Pokorny-Rosa attack." These erratum packages contain patches provided by the OpenSSL group that enable RSA blinding by default and protect against the other vulnerabilities. Because server applications are affected by these vulnerabilities, users are advised to restart all services that use OpenSSL functionality, or reboot their systems after installing these updates.
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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{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "Updated OpenSSL packages that fix potential timing-based and modified\nBleichenbacher attacks are available for Red Hat Linux on IBM iSeries and\npSeries systems.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "OpenSSL is a commercial-grade, full-featured, and open source toolkit that \nimplements Secure Sockets Layer (SSL v2/v3) and Transport Layer\nSecurity (TLS v1) protocols as well as a full-strength general purpose\ncryptography library.\n\nIn a paper, Brice Canvel, Alain Hiltgen, Serge Vaudenay, and Martin\nVuagnoux describe and demonstrate a timing-based attack on CBC ciphersuites\nin SSL and TLS. An active attacker may be able to use timing observations\nto distinguish between two different error cases: cipher padding errors and\nMAC verification errors. Over multiple connections this can leak\nsufficient information to make it possible to retrieve the plaintext of a\ncommon, fixed block.\n\nIn order for an attack to be sucessful, an attacker must be able to act as\na man-in-the-middle to intercept and modify multiple connections, which all\ninvolve a common fixed plaintext block (such as a password), and have good\nnetwork conditions that allow small changes in timing to be reliably\nobserved.\n\nResearchers discovered a timing attack on RSA keys.  Applications making\nuse of OpenSSL are generally vulnerable to such an attack, unless RSA\nblinding has been turned on.  OpenSSL does not use RSA blinding by default\nand most applications do not enable RSA blinding.  \n\nA local or remote attacker could use this attack to obtain the server\u0027s\nprivate key by determining factors using timing differences on (1) the\nnumber of extra reductions during Montgomery reduction, and (2) the use of\ndifferent integer multiplication algorithms (\"Karatsuba\" and normal).\n\nIn order for an attack to be sucessful, an attacker must have good\nnetwork conditions allowing small changes in timing to be reliably\nobserved.\n\nAdditionally, the SSL and TLS components for OpenSSL allow remote attackers\nto perform an unauthorized RSA private key operation via a modified\nBleichenbacher attack. This attack uses a large number of SSL or TLS\nconnections, using PKCS #1 v1.5 padding, and causes OpenSSL to leak\ninformation regarding the relationship between ciphertext and the\nassociated plaintext, aka the \"Klima-Pokorny-Rosa attack.\"\n\nThese erratum packages contain patches provided by the OpenSSL group that\nenable RSA blinding by default and protect against the other vulnerabilities.\n\nBecause server applications are affected by these vulnerabilities, users\nare advised to restart all services that use OpenSSL functionality, or\nreboot their systems after installing these updates.",
        "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"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://access.redhat.com/security/team/contact/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2003:205",
        "url": "https://access.redhat.com/errata/RHSA-2003:205"
      },
      {
        "category": "external",
        "summary": "http://crypto.stanford.edu/~dabo/papers/ssl-timing.pdf",
        "url": "http://crypto.stanford.edu/~dabo/papers/ssl-timing.pdf"
      },
      {
        "category": "external",
        "summary": "http://eprint.iacr.org/2003/052/",
        "url": "http://eprint.iacr.org/2003/052/"
      },
      {
        "category": "external",
        "summary": "86112",
        "url": "https://bugzilla.redhat.com/show_bug.cgi?id=86112"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2003/rhsa-2003_205.json"
      }
    ],
    "title": "Red Hat Security Advisory: : : : Updated OpenSSL packages fix vulnerabilities",
    "tracking": {
      "current_release_date": "2024-11-21T22:43:08+00:00",
      "generator": {
        "date": "2024-11-21T22:43:08+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
        }
      },
      "id": "RHSA-2003:205",
      "initial_release_date": "2003-06-23T17:37:00+00:00",
      "revision_history": [
        {
          "date": "2003-06-23T17:37:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2003-06-23T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:43:08+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.1",
                "product": {
                  "name": "Red Hat Linux 7.1",
                  "product_id": "Red Hat Linux 7.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.1"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2003-0078",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616956"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "ssl3_get_record in s3_pkt.c for OpenSSL before 0.9.7a and 0.9.6 before 0.9.6i does not perform a MAC computation if an incorrect block cipher padding is used, which causes an information leak (timing discrepancy) that may make it easier to launch cryptographic attacks that rely on distinguishing between padding and MAC verification errors, possibly leading to extraction of the original plaintext, aka the \"Vaudenay timing attack.\"",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Linux 7.1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2003-0078"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616956",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616956"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2003-0078",
          "url": "https://www.cve.org/CVERecord?id=CVE-2003-0078"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2003-0078",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2003-0078"
        }
      ],
      "release_date": "2003-02-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-06-23T17:37:00+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nTo update all RPMs for your particular architecture, run:\n\nrpm -Fvh [filenames]\n\nwhere [filenames] is a list of the RPMs you wish to upgrade.  Only those\nRPMs which are currently installed will be updated.  Those RPMs which are\nnot installed but included in the list will not be updated.  Note that you\ncan also use wildcards (*.rpm) if your current directory *only* contains\nthe desired RPMs.\n\nPlease note that this update is also available via Red Hat Network.  Many\npeople find this an easier way to apply updates.  To use Red Hat Network,\nlaunch the Red Hat Update Agent with the following command:\n\nup2date\n\nThis will start an interactive process that will result in the appropriate\nRPMs being upgraded on your system.",
          "product_ids": [
            "Red Hat Linux 7.1"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:205"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "security flaw"
    },
    {
      "cve": "CVE-2003-0131",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616975"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The SSL and TLS components for OpenSSL 0.9.6i and earlier, 0.9.7, and 0.9.7a allow remote attackers to perform an unauthorized RSA private key operation via a modified Bleichenbacher attack that uses a large number of SSL or TLS connections using PKCS #1 v1.5 padding that cause OpenSSL to leak information regarding the relationship between ciphertext and the associated plaintext, aka the \"Klima-Pokorny-Rosa attack.\"",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Enterprise Linux 4 and 5 are not vulnerable to this issue as they both contain a backported patch.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Linux 7.1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2003-0131"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616975",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616975"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2003-0131",
          "url": "https://www.cve.org/CVERecord?id=CVE-2003-0131"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2003-0131",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2003-0131"
        }
      ],
      "release_date": "2003-03-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-06-23T17:37:00+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nTo update all RPMs for your particular architecture, run:\n\nrpm -Fvh [filenames]\n\nwhere [filenames] is a list of the RPMs you wish to upgrade.  Only those\nRPMs which are currently installed will be updated.  Those RPMs which are\nnot installed but included in the list will not be updated.  Note that you\ncan also use wildcards (*.rpm) if your current directory *only* contains\nthe desired RPMs.\n\nPlease note that this update is also available via Red Hat Network.  Many\npeople find this an easier way to apply updates.  To use Red Hat Network,\nlaunch the Red Hat Update Agent with the following command:\n\nup2date\n\nThis will start an interactive process that will result in the appropriate\nRPMs being upgraded on your system.",
          "product_ids": [
            "Red Hat Linux 7.1"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:205"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "security flaw"
    },
    {
      "cve": "CVE-2003-0147",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616986"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "OpenSSL does not use RSA blinding by default, which allows local and remote attackers to obtain the server\u0027s private key by determining factors using timing differences on (1) the number of extra reductions during Montgomery reduction, and (2) the use of different integer multiplication algorithms (\"Karatsuba\" and normal).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Enterprise Linux 5 is not vulnerable to this issue as it contains a backported patch.",
          "title": "Statement"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Linux 7.1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2003-0147"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616986",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616986"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2003-0147",
          "url": "https://www.cve.org/CVERecord?id=CVE-2003-0147"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2003-0147",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2003-0147"
        }
      ],
      "release_date": "2003-03-14T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-06-23T17:37:00+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nTo update all RPMs for your particular architecture, run:\n\nrpm -Fvh [filenames]\n\nwhere [filenames] is a list of the RPMs you wish to upgrade.  Only those\nRPMs which are currently installed will be updated.  Those RPMs which are\nnot installed but included in the list will not be updated.  Note that you\ncan also use wildcards (*.rpm) if your current directory *only* contains\nthe desired RPMs.\n\nPlease note that this update is also available via Red Hat Network.  Many\npeople find this an easier way to apply updates.  To use Red Hat Network,\nlaunch the Red Hat Update Agent with the following command:\n\nup2date\n\nThis will start an interactive process that will result in the appropriate\nRPMs being upgraded on your system.",
          "product_ids": [
            "Red Hat Linux 7.1"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:205"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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