CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
51.5%
The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2022:2037-1 advisory.
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12. (CVE-2021-3695)
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it’s very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. (CVE-2021-3696)
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12. (CVE-2021-3697)
grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)
grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)
grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2022:2037-1. The text itself
# is copyright (C) SUSE.
##
include('compat.inc');
if (description)
{
script_id(162128);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/18");
script_cve_id(
"CVE-2021-3695",
"CVE-2021-3696",
"CVE-2021-3697",
"CVE-2022-28733",
"CVE-2022-28734",
"CVE-2022-28736"
);
script_xref(name:"SuSE", value:"SUSE-SU-2022:2037-1");
script_name(english:"SUSE SLES12 Security Update : grub2 (SUSE-SU-2022:2037-1)");
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 SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as
referenced in the SUSE-SU-2022:2037-1 advisory.
- A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may
take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent
secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform
some triage over the heap layout to achieve signifcant results, also the values written into the memory
are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2
versions prior grub-2.12. (CVE-2021-3695)
- A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may
lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be
considered Low as it's very complex to an attacker control the encoding and positioning of corrupted
Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This
flaw affects grub2 versions prior grub-2.12. (CVE-2021-3696)
- A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data
to be written in heap. To a successful to be performed the attacker needs to perform some triage over the
heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data
corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions
prior grub-2.12. (CVE-2021-3697)
- grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)
- grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)
- grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)
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/1191184");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1191185");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1191186");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1193282");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1197948");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198460");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198493");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198496");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1198581");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3695");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3696");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3697");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-28733");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-28734");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2022-28736");
# https://lists.suse.com/pipermail/sle-security-updates/2022-June/011257.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f522da95");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/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:N/AC:H/PR:N/UI:N/S:U/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-2021-3696");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-28733");
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:"2022/06/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/06/11");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-arm64-efi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-i386-pc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-powerpc-ieee1275");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-s390x-emu");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-snapper-plugin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-systemd-sleep-plugin");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-x86_64-efi");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:grub2-x86_64-xen");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
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) 2022-2024 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)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12|SLES_SAP12)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES12 / SLES_SAP12', 'SUSE (' + os_ver + ')');
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE (' + os_ver + ')', cpu);
var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(3)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES12 SP3", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP12" && (! preg(pattern:"^(3)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP12 SP3", os_ver + " SP" + service_pack);
var pkgs = [
{'reference':'grub2-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.3']},
{'reference':'grub2-i386-pc-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.3']},
{'reference':'grub2-snapper-plugin-2.02-137.2', 'sp':'3', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.3']},
{'reference':'grub2-systemd-sleep-plugin-2.02-137.2', 'sp':'3', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.3']},
{'reference':'grub2-x86_64-efi-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.3']},
{'reference':'grub2-x86_64-xen-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.3']},
{'reference':'grub2-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-2.02-137.2', 'sp':'3', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-arm64-efi-2.02-137.2', 'sp':'3', 'cpu':'aarch64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-i386-pc-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-i386-pc-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-s390x-emu-2.02-137.2', 'sp':'3', 'cpu':'s390x', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-snapper-plugin-2.02-137.2', 'sp':'3', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-snapper-plugin-2.02-137.2', 'sp':'3', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-systemd-sleep-plugin-2.02-137.2', 'sp':'3', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-systemd-sleep-plugin-2.02-137.2', 'sp':'3', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-x86_64-efi-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-x86_64-efi-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-x86_64-xen-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']},
{'reference':'grub2-x86_64-xen-2.02-137.2', 'sp':'3', 'cpu':'x86_64', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.3']}
];
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_WARNING,
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, 'grub2 / grub2-arm64-efi / grub2-i386-pc / grub2-s390x-emu / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
novell | suse_linux | grub2 | p-cpe:/a:novell:suse_linux:grub2 |
novell | suse_linux | grub2-arm64-efi | p-cpe:/a:novell:suse_linux:grub2-arm64-efi |
novell | suse_linux | grub2-i386-pc | p-cpe:/a:novell:suse_linux:grub2-i386-pc |
novell | suse_linux | grub2-powerpc-ieee1275 | p-cpe:/a:novell:suse_linux:grub2-powerpc-ieee1275 |
novell | suse_linux | grub2-s390x-emu | p-cpe:/a:novell:suse_linux:grub2-s390x-emu |
novell | suse_linux | grub2-snapper-plugin | p-cpe:/a:novell:suse_linux:grub2-snapper-plugin |
novell | suse_linux | grub2-systemd-sleep-plugin | p-cpe:/a:novell:suse_linux:grub2-systemd-sleep-plugin |
novell | suse_linux | grub2-x86_64-efi | p-cpe:/a:novell:suse_linux:grub2-x86_64-efi |
novell | suse_linux | grub2-x86_64-xen | p-cpe:/a:novell:suse_linux:grub2-x86_64-xen |
novell | suse_linux | 12 | cpe:/o:novell:suse_linux:12 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3695
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3696
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3697
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28733
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28734
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-28736
www.nessus.org/u?f522da95
bugzilla.suse.com/1191184
bugzilla.suse.com/1191185
bugzilla.suse.com/1191186
bugzilla.suse.com/1193282
bugzilla.suse.com/1197948
bugzilla.suse.com/1198460
bugzilla.suse.com/1198493
bugzilla.suse.com/1198496
bugzilla.suse.com/1198581
www.suse.com/security/cve/CVE-2021-3695
www.suse.com/security/cve/CVE-2021-3696
www.suse.com/security/cve/CVE-2021-3697
www.suse.com/security/cve/CVE-2022-28733
www.suse.com/security/cve/CVE-2022-28734
www.suse.com/security/cve/CVE-2022-28736
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
51.5%