This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.SUSE_SU-2024-1368-1.NASLSUSE SLED15 / SLES15 / openSUSE 15 Security Update : shim (SUSE-SU-2024:1368-1)
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
79.6%
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.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2024:1368-1. The text itself
# is copyright (C) SUSE.
##
include('compat.inc');
if (description)
{
script_id(193725);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/23");
script_cve_id(
"CVE-2022-28737",
"CVE-2023-40546",
"CVE-2023-40547",
"CVE-2023-40548",
"CVE-2023-40549",
"CVE-2023-40550",
"CVE-2023-40551"
);
script_xref(name:"SuSE", value:"SUSE-SU-2024:1368-1");
script_name(english:"SUSE SLED15 / SLES15 / openSUSE 15 Security Update : shim (SUSE-SU-2024:1368-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"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.");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198101");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1205588");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1205855");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1210382");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1213945");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1215098");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1215099");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1215100");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1215101");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1215102");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1215103");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1219460");
script_set_attribute(attribute:"see_also", value:"https://lists.suse.com/pipermail/sle-updates/2024-April/035046.html");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-28737");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-40546");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-40547");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-40548");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-40549");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-40550");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2023-40551");
script_set_attribute(attribute:"solution", value:
"Update the affected shim package.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-28737");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-40547");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/06/16");
script_set_attribute(attribute:"patch_publication_date", value:"2024/04/22");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/23");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:shim");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
exit(0);
}
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES|SUSE)") audit(AUDIT_OS_NOT, "SUSE / openSUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+|SUSE([\d.]+))", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE / openSUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLED_SAP15|SLES15|SLES_SAP15|SUSE15\.5)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15', 'SUSE / openSUSE (' + os_ver + ')');
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE / openSUSE (' + os_ver + ')', cpu);
var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLED15" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED15 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLED_SAP15" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLED_SAP15 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLES15" && (! preg(pattern:"^(3|4|5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES15 SP3/4/5", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP15" && (! preg(pattern:"^(3|4|5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP15 SP3/4/5", os_ver + " SP" + service_pack);
var pkgs = [
{'reference':'shim-15.8-150300.4.20.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.3']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'4', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.4']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'aarch64', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLED_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'aarch64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLES_SAP15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'4', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-4']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-ESPOS-release-4', 'SUSE-Manager-Proxy-release-4.3', 'SUSE-Manager-Server-release-4.3']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'3', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-LTSS-release-15.3', 'sles-ltss-release-15.3']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-LTSS-release-15.3', 'sles-ltss-release-15.3']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'4', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-LTSS-release-15.4', 'sles-ltss-release-15.4']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'4', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-LTSS-release-15.4', 'sles-ltss-release-15.4']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'aarch64', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.5', 'sle-module-basesystem-release-15.5', 'sled-release-15.5', 'sles-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLED15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.5', 'sle-module-basesystem-release-15.5', 'sled-release-15.5', 'sles-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'aarch64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.5', 'sle-module-basesystem-release-15.5', 'sled-release-15.5', 'sles-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'sp':'5', 'cpu':'x86_64', 'release':'SLES15', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLE_HPC-release-15.5', 'sle-module-basesystem-release-15.5', 'sled-release-15.5', 'sles-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'cpu':'aarch64', 'release':'SUSE15.5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.5']},
{'reference':'shim-15.8-150300.4.20.2', 'cpu':'x86_64', 'release':'SUSE15.5', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['openSUSE-release-15.5']}
];
var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var exists_check = NULL;
var rpm_spec_vers_cmp = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) _release = package_array['release'];
if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (reference && _release) {
if (exists_check) {
var check_flag = 0;
foreach var check (exists_check) {
if (!rpm_exists(release:_release, rpm:check)) continue;
if ('ltss' >< tolower(check)) ltss_caveat_required = TRUE;
check_flag++;
}
if (!check_flag) continue;
}
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
}
}
if (flag)
{
var ltss_plugin_caveat = NULL;
if(ltss_caveat_required) ltss_plugin_caveat = '\n' +
'NOTE: This vulnerability check contains fixes that apply to\n' +
'packages only available in SUSE Enterprise Linux Server LTSS\n' +
'repositories. Access to these package security updates require\n' +
'a paid SUSE LTSS subscription.\n';
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get() + ltss_plugin_caveat
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'shim');
}
References
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28737
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40546
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40547
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40548
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40549
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40550
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-40551
bugzilla.suse.com/1198101
bugzilla.suse.com/1205588
bugzilla.suse.com/1205855
bugzilla.suse.com/1210382
bugzilla.suse.com/1213945
bugzilla.suse.com/1215098
bugzilla.suse.com/1215099
bugzilla.suse.com/1215100
bugzilla.suse.com/1215101
bugzilla.suse.com/1215102
bugzilla.suse.com/1215103
bugzilla.suse.com/1219460
lists.suse.com/pipermail/sle-updates/2024-April/035046.html
www.suse.com/security/cve/CVE-2022-28737
www.suse.com/security/cve/CVE-2023-40546
www.suse.com/security/cve/CVE-2023-40547
www.suse.com/security/cve/CVE-2023-40548
www.suse.com/security/cve/CVE-2023-40549
www.suse.com/security/cve/CVE-2023-40550
www.suse.com/security/cve/CVE-2023-40551
Related
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
79.6%