rhsa-2023_7166
Vulnerability from csaf_redhat
Published
2023-11-14 15:53
Modified
2024-11-23 00:00
Summary
Red Hat Security Advisory: tpm2-tss security and enhancement update

Notes

Topic
An update for tpm2-tss is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Low. 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 tpm2-tss packages provide the Intel implementation of the Trusted Platform Module (TPM) 2.0 System API library. This library enables programs to interact with TPM 2.0 devices Security Fix(es): * tpm2-tss: Buffer Overlow in TSS2_RC_Decode (CVE-2023-22745) 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 8.9 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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  "vulnerabilities": [
    {
      "cve": "CVE-2023-22745",
      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "discovery_date": "2023-01-20T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2162610"
        }
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in tpm2-tss, which is an open source software implementation of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) 2 Software Stack (TSS2). In affected versions, `Tss2_RC_SetHandler` and `Tss2_RC_Decode` index into the `layer_handler` with an 8-bit layer number, but the array only has `TPM2_ERROR_TSS2_RC_LAYER_COUNT` entries. Trying to add a handler for higher-numbered layers or to decode a response code with a layer number, reads/writes past the end of the buffer. This buffer overrun could result in arbitrary code execution. An example attack is a man-in-the-middle (MiTM) bus attack that returns 0xFFFFFFFFFF for the RC. Given the common use case of TPM modules, an attacker must have local access to the target machine with local system privileges, which allows access to the TPM system. Usually, TPM access requires administrative privileges.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "tpm2-tss: Buffer Overlow in TSS2_RC_Decode",
          "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"
        }
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          "url": "https://access.redhat.com/security/cve/CVE-2023-22745"
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          "summary": "RHBZ#2162610",
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-22745",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-22745"
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          "category": "external",
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-22745"
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          "category": "external",
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          "url": "https://github.com/tpm2-software/tpm2-tss/security/advisories/GHSA-4j3v-fh23-vx67"
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          "category": "vendor_fix",
          "date": "2023-11-14T15:53:09+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",
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            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "tpm2-tss: Buffer Overlow in TSS2_RC_Decode"
    }
  ]
}


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