8 High
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.3%
The version of kernel installed on the remote host is prior to 5.15.152-100.162. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.15-2024-040 advisory.
2024-06-06: CVE-2024-27417 was added to this advisory.
2024-05-23: CVE-2024-26782 was added to this advisory.
2024-04-25: CVE-2024-26603 was added to this advisory.
A flaw was found in the smb client in the Linux kernel. A potential out-of-bounds error was seen in the smb2_parse_contexts() function. Validate offsets and lengths before dereferencing create contexts in smb2_parse_contexts(). (CVE-2023-52434)
A vulnerability was discovered in the Linux kernel's IPv4 networking stack. Under certain conditions, MPTCP and NetLabel can be configured in a way that triggers a double free memory error in net/ipv4/af_inet.c:inet_sock_destruct(). This may lead to a system crash, denial of service, or potential arbitrary code execution. (CVE-2024-1627)
In the Linux kernel, the following vulnerability has been resolved:
ext4: regenerate buddy after block freeing failed if under fc replay
This mostly reverts commit 6bd97bf273bd (ext4: remove redundantmb_regenerate_buddy()) and reintroduces mb_regenerate_buddy(). Based oncode in mb_free_blocks(), fast commit replay can end up marking as freeblocks that are already marked as such. This causes corruption of thebuddy bitmap so we need to regenerate it in that case. (CVE-2024-26601)
In the Linux kernel, the following vulnerability has been resolved:
x86/fpu: Stop relying on userspace for info to fault in xsave buffer
Before this change, the expected size of the user space buffer wastaken from fx_sw->xstate_size.
fx_sw->xstate_size can be changedfrom user-space, so it is possible construct a sigreturn frame where:
* fx_sw->xstate_size is smaller than the size required by valid bits infx_sw->xfeatures.* user-space unmaps parts of the sigrame fpu buffer so that not all ofthe buffer required by xrstor is accessible.
In this case, xrstor tries to restore and accesses the unmapped areawhich results in a fault. But fault_in_readable succeeds because buf +fx_sw->xstate_size is within the still mapped area, so it goes back andtries xrstor again. It will spin in this loop forever.
Instead, fault in the maximum size which can be touched by XRSTOR (takenfrom fpstate->user_size).
[ dhansen: tweak subject / changelog ] (CVE-2024-26603)
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix double-free on socket dismantle (CVE-2024-26782)
In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix potential struct net leak in inet6_rtm_getaddr() (CVE-2024-27417)
Tenable has extracted the preceding description block directly from the tested product security advisory.
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 descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALASKERNEL-5.15-2024-040.
##
include('compat.inc');
if (description)
{
script_id(192741);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/07");
script_cve_id(
"CVE-2023-52434",
"CVE-2024-1627",
"CVE-2024-26601",
"CVE-2024-26603",
"CVE-2024-26782",
"CVE-2024-27417"
);
script_name(english:"Amazon Linux 2 : kernel (ALASKERNEL-5.15-2024-040)");
script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
script_set_attribute(attribute:"description", value:
"The version of kernel installed on the remote host is prior to 5.15.152-100.162. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS2KERNEL-5.15-2024-040 advisory.
2024-06-06: CVE-2024-27417 was added to this advisory.
2024-05-23: CVE-2024-26782 was added to this advisory.
2024-04-25: CVE-2024-26603 was added to this advisory.
A flaw was found in the smb client in the Linux kernel. A potential out-of-bounds error was seen in the
smb2_parse_contexts() function. Validate offsets and lengths before dereferencing create contexts in
smb2_parse_contexts(). (CVE-2023-52434)
A vulnerability was discovered in the Linux kernel's IPv4 networking stack. Under certain conditions,
MPTCP and NetLabel can be configured in a way that triggers a double free memory error in
net/ipv4/af_inet.c:inet_sock_destruct(). This may lead to a system crash, denial of service, or potential
arbitrary code execution. (CVE-2024-1627)
In the Linux kernel, the following vulnerability has been resolved:
ext4: regenerate buddy after block freeing failed if under fc replay
This mostly reverts commit 6bd97bf273bd (ext4: remove redundantmb_regenerate_buddy()) and reintroduces
mb_regenerate_buddy(). Based oncode in mb_free_blocks(), fast commit replay can end up marking as
freeblocks that are already marked as such. This causes corruption of thebuddy bitmap so we need to
regenerate it in that case. (CVE-2024-26601)
In the Linux kernel, the following vulnerability has been resolved:
x86/fpu: Stop relying on userspace for info to fault in xsave buffer
Before this change, the expected size of the user space buffer wastaken from fx_sw->xstate_size.
fx_sw->xstate_size can be changedfrom user-space, so it is possible construct a sigreturn frame where:
* fx_sw->xstate_size is smaller than the size required by valid bits infx_sw->xfeatures.* user-space
unmaps parts of the sigrame fpu buffer so that not all ofthe buffer required by xrstor is accessible.
In this case, xrstor tries to restore and accesses the unmapped areawhich results in a fault. But
fault_in_readable succeeds because buf +fx_sw->xstate_size is within the still mapped area, so it goes
back andtries xrstor again. It will spin in this loop forever.
Instead, fault in the maximum size which can be touched by XRSTOR (takenfrom fpstate->user_size).
[ dhansen: tweak subject / changelog ] (CVE-2024-26603)
In the Linux kernel, the following vulnerability has been resolved:
mptcp: fix double-free on socket dismantle (CVE-2024-26782)
In the Linux kernel, the following vulnerability has been resolved:
ipv6: fix potential struct net leak in inet6_rtm_getaddr() (CVE-2024-27417)
Tenable has extracted the preceding description block directly from the tested product security advisory.
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://alas.aws.amazon.com/AL2/ALASKERNEL-5.15-2024-040.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-52434.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-1627.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-26601.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-26603.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-26782.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-27417.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update kernel' to update your system.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:S/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:L/PR:L/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-2023-52434");
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:"2024/02/20");
script_set_attribute(attribute:"patch_publication_date", value:"2024/03/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/01");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bpftool");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:bpftool-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-headers");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-livepatch-5.15.152-100.162");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:kernel-tools-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python-perf");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python-perf-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Amazon Linux 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", "kpatch.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
exit(0);
}
include("rpm.inc");
include("hotfixes.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "2")
{
if (os_ver == 'A') os_ver = 'AMI';
audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}
if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
if (get_one_kb_item("Host/kpatch/kernel-cves"))
{
set_hotfix_type("kpatch");
var cve_list = make_list("CVE-2023-52434", "CVE-2024-1627", "CVE-2024-26601", "CVE-2024-26603", "CVE-2024-26782", "CVE-2024-27417");
if (hotfix_cves_check(cve_list))
{
audit(AUDIT_PATCH_INSTALLED, "kpatch hotfix for ALASKERNEL-5.15-2024-040");
}
else
{
__rpm_report = hotfix_reporting_text();
}
}
var pkgs = [
{'reference':'bpftool-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'bpftool-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'bpftool-debuginfo-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'bpftool-debuginfo-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-debuginfo-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-debuginfo-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-debuginfo-common-aarch64-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-debuginfo-common-x86_64-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-devel-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-devel-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-headers-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-headers-5.15.152-100.162.amzn2', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-headers-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-livepatch-5.15.152-100.162-1.0-0.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-livepatch-5.15.152-100.162-1.0-0.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-tools-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-tools-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-tools-debuginfo-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-tools-debuginfo-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-tools-devel-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'kernel-tools-devel-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'perf-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'perf-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'perf-debuginfo-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'perf-debuginfo-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'python-perf-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'python-perf-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'python-perf-debuginfo-5.15.152-100.162.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'},
{'reference':'python-perf-debuginfo-5.15.152-100.162.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'kernel-5.15'}
];
var flag = 0;
foreach var package_array ( pkgs ) {
var reference = NULL;
var _release = NULL;
var sp = NULL;
var _cpu = NULL;
var el_string = NULL;
var rpm_spec_vers_cmp = NULL;
var epoch = NULL;
var allowmaj = NULL;
var exists_check = 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['el_string'])) el_string = package_array['el_string'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get()
);
exit(0);
}
else
{
var tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "bpftool / bpftool-debuginfo / kernel / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | perf | p-cpe:/a:amazon:linux:perf |
amazon | linux | python-perf | p-cpe:/a:amazon:linux:python-perf |
amazon | linux | bpftool | p-cpe:/a:amazon:linux:bpftool |
amazon | linux | perf-debuginfo | p-cpe:/a:amazon:linux:perf-debuginfo |
amazon | linux | kernel-tools-debuginfo | p-cpe:/a:amazon:linux:kernel-tools-debuginfo |
amazon | linux | kernel-debuginfo-common-aarch64 | p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64 |
amazon | linux | kernel-tools | p-cpe:/a:amazon:linux:kernel-tools |
amazon | linux | kernel-devel | p-cpe:/a:amazon:linux:kernel-devel |
amazon | linux | python-perf-debuginfo | p-cpe:/a:amazon:linux:python-perf-debuginfo |
amazon | linux | kernel | p-cpe:/a:amazon:linux:kernel |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52434
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-1627
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26601
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26603
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26782
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-27417
alas.aws.amazon.com/AL2/ALASKERNEL-5.15-2024-040.html
alas.aws.amazon.com/cve/html/CVE-2023-52434.html
alas.aws.amazon.com/cve/html/CVE-2024-1627.html
alas.aws.amazon.com/cve/html/CVE-2024-26601.html
alas.aws.amazon.com/cve/html/CVE-2024-26603.html
alas.aws.amazon.com/cve/html/CVE-2024-26782.html
alas.aws.amazon.com/cve/html/CVE-2024-27417.html
alas.aws.amazon.com/faqs.html
8 High
CVSS3
Attack Vector
ADJACENT
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8 High
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
10.3%