The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1368-1 advisory.

  - There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables;
    The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An     attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not     discarded in such scenario. (CVE-2022-28737)

  - 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't match the format string used by it, leading to a crash under certain     circumstances. (CVE-2023-40546)

  - 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.
    (CVE-2023-40547)

  - 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. (CVE-2023-40548)

  - 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. (CVE-2023-40549)

  - 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's boot phase. (CVE-2023-40550)

  - 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's boot phase. (CVE-2023-40551)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

Analytics

SUSE SLED15 / SLES15 / openSUSE 15 Security Update : shim (SUSE-SU-2024:1368-1)

high Nessus Plugin ID 193725

Version 1.0