suse-su-2025:20136-1
Vulnerability from csaf_suse
Published
2025-03-07 15:31
Modified
2025-03-07 15:31
Summary
Security update for pcr-oracle, shim

Notes

Title of the patch
Security update for pcr-oracle, shim
Description of the patch
This update for pcr-oracle, shim fixes the following issues: pcr-oracle: - predict SbatLevelRT for the next boot (bsc#1230316) shim was updated to version 15.8: - Update shim-install to use the 'removable' way for encrypted SL-Micro images (bsc#1230316) * Always use the removable way for SL-Micro * Limit the removable option to encrypted SL-Micro Security issues fixed: - mok: fix LogError() invocation (bsc#1215099,CVE-2023-40546) - avoid incorrectly trusting HTTP headers (bsc#1215098,CVE-2023-40547) - Fix integer overflow on SBAT section size on 32-bit system (bsc#1215100,CVE-2023-40548) - Authenticode: verify that the signature header is in bounds (bsc#1215101,CVE-2023-40549) - pe: Fix an out-of-bound read in verify_buffer_sbat() (bsc#1215102,CVE-2023-40550) - pe-relocate: Fix bounds check for MZ binaries (bsc#1215103,CVE-2023-40551)
Patchnames
SUSE-SLE-Micro-6.0-225
Terms of use
CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).


To clipboard 

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        "text": "This update for pcr-oracle, shim fixes the following issues:\n\npcr-oracle:\n\n- predict SbatLevelRT for the next boot (bsc#1230316)\n\nshim was updated to version 15.8:\n\n- Update shim-install to use the \u0027removable\u0027 way for encrypted\n  SL-Micro images (bsc#1230316)\n  * Always use the removable way for SL-Micro\n  * Limit the removable option to encrypted SL-Micro\n\n\nSecurity issues fixed:\n\n- mok: fix LogError() invocation (bsc#1215099,CVE-2023-40546)\n- avoid incorrectly trusting HTTP headers (bsc#1215098,CVE-2023-40547)\n- Fix integer overflow on SBAT section size on 32-bit system (bsc#1215100,CVE-2023-40548)\n- Authenticode: verify that the signature header is in bounds (bsc#1215101,CVE-2023-40549)\n- pe: Fix an out-of-bound read in verify_buffer_sbat() (bsc#1215102,CVE-2023-40550)\n- pe-relocate: Fix bounds check for MZ binaries (bsc#1215103,CVE-2023-40551)\n\n\n",
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        {
          "category": "general",
          "text": "A flaw was found in Shim when an error happened while creating a new ESL variable. If Shim fails to create the new variable, it tries to print an error message to the user; however, the number of parameters used by the logging function doesn\u0027t match the format string used by it, leading to a crash under certain circumstances.",
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          "text": "A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.",
          "title": "CVE description"
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        {
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        {
          "category": "general",
          "text": "A buffer overflow was found in Shim in the 32-bit system. The overflow happens due to an addition operation involving a user-controlled value parsed from the PE binary being used by Shim. This value is further used for memory allocation operations, leading to a heap-based buffer overflow. This flaw causes memory corruption and can lead to a crash or data integrity issues during the boot phase.",
          "title": "CVE description"
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            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
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          "text": "https://www.suse.com/security/cve/CVE-2023-40549"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.",
          "title": "CVE description"
        }
      ],
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        },
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          "product_ids": [
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
          ]
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
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      ],
      "notes": [
        {
          "category": "general",
          "text": "An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system\u0027s boot phase.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
          "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
          "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2023-40550",
          "url": "https://www.suse.com/security/cve/CVE-2023-40550"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1215102 for CVE-2023-40550",
          "url": "https://bugzilla.suse.com/1215102"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.2,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-03-07T15:31:20Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2023-40550"
    },
    {
      "cve": "CVE-2023-40551",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2023-40551"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system\u0027s boot phase.",
          "title": "CVE description"
        }
      ],
      "product_status": {
        "recommended": [
          "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
          "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
          "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
          "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "CVE-2023-40551",
          "url": "https://www.suse.com/security/cve/CVE-2023-40551"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1215103 for CVE-2023-40551",
          "url": "https://bugzilla.suse.com/1215103"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.aarch64",
            "SUSE Linux Micro 6.0:pcr-oracle-0.4.6-2.1.x86_64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.aarch64",
            "SUSE Linux Micro 6.0:shim-15.8-1.1.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2025-03-07T15:31:20Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2023-40551"
    }
  ]
}


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