rhsa-2021_1600
Vulnerability from csaf_redhat
Published
2021-05-18 14:50
Modified
2024-11-22 15:53
Summary
Red Hat Security Advisory: opensc security, bug fix, and enhancement update

Notes

Topic
An update for opensc is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
The OpenSC set of libraries and utilities provides support for working with smart cards. OpenSC focuses on cards that support cryptographic operations and enables their use for authentication, mail encryption, or digital signatures. Security Fix(es): * opensc: heap-based buffer overflow in sc_oberthur_read_file (CVE-2020-26570) * opensc: stack-based buffer overflow in sc_pkcs15emu_gemsafeGPK_init (CVE-2020-26571) * opensc: stack-based buffer overflow in tcos_decipher (CVE-2020-26572) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.
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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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2020-26572"
        },
        {
          "category": "external",
          "summary": "RHBZ#1885954",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1885954"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2020-26572",
          "url": "https://www.cve.org/CVERecord?id=CVE-2020-26572"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-26572",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-26572"
        }
      ],
      "release_date": "2020-10-06T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2021-05-18T14:50:53+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
            "BaseOS-8.4.0.GA:opensc-0:0.20.0-4.el8.aarch64",
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            "BaseOS-8.4.0.GA:opensc-debuginfo-0:0.20.0-4.el8.i686",
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            "BaseOS-8.4.0.GA:opensc-debuginfo-0:0.20.0-4.el8.x86_64",
            "BaseOS-8.4.0.GA:opensc-debugsource-0:0.20.0-4.el8.aarch64",
            "BaseOS-8.4.0.GA:opensc-debugsource-0:0.20.0-4.el8.i686",
            "BaseOS-8.4.0.GA:opensc-debugsource-0:0.20.0-4.el8.ppc64le",
            "BaseOS-8.4.0.GA:opensc-debugsource-0:0.20.0-4.el8.s390x",
            "BaseOS-8.4.0.GA:opensc-debugsource-0:0.20.0-4.el8.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:1600"
        },
        {
          "category": "workaround",
          "details": "This flaw can be mitigated in cases where you can use opensc without the TCOS driver enabled. In such cases, the vulnerable driver can be disabled by specifying them in /etc/opensc.conf card_drivers field in allowlist fashion.\nOne such example:\n\n```\napp default {\n   card_drivers = cac, cac1, PIV-II;\n}\n```\n\nThis would only enable the cac, cac1, and PIV-II smart card drivers, and all others would be disabled, including the TCOS driver. With the TCOS driver disabled, this flaw is mitigated. It is important to list all drivers that you need in the card_drivers field so that they are not disabled too.",
          "product_ids": [
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          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "PHYSICAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "opensc: stack-based buffer overflow in tcos_decipher"
    }
  ]
}


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