CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
5.1%
The version of util-linux installed on the remote host is prior to 2.30.2-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2022-1878 advisory.
Note that Nessus has not tested for this issue 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 ALAS-2022-1878.
##
include('compat.inc');
if (description)
{
script_id(168443);
script_version("1.2");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/07");
script_cve_id("CVE-2018-7738");
script_name(english:"Amazon Linux 2 : util-linux (ALAS-2022-1878)");
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 util-linux installed on the remote host is prior to 2.30.2-2. It is, therefore, affected by a
vulnerability as referenced in the ALAS2-2022-1878 advisory.
- In util-linux before 2.32-rc1, bash-completion/umount allows local users to gain privileges by embedding
shell commands in a mountpoint name, which is mishandled during a umount command (within Bash) by a
different user, as demonstrated by logging in as root and entering umount followed by a tab character for
autocompletion. (CVE-2018-7738)
Note that Nessus has not tested for this issue 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/ALAS-2022-1878.html");
script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2018-7738.html");
script_set_attribute(attribute:"solution", value:
"Run 'yum update util-linux' to update your system.");
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:L/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-2018-7738");
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:"2018/03/07");
script_set_attribute(attribute:"patch_publication_date", value:"2022/11/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/12/07");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libblkid");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libblkid-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libfdisk");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libfdisk-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libmount");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libmount-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsmartcols");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libsmartcols-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libuuid");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:libuuid-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:python-libmount");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:util-linux");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:util-linux-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:util-linux-user");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:uuidd");
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) 2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");
exit(0);
}
include("rpm.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);
var pkgs = [
{'reference':'libblkid-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-devel-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-devel-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libblkid-devel-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-devel-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-devel-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libfdisk-devel-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-devel-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-devel-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libmount-devel-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-devel-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-devel-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libsmartcols-devel-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-devel-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-devel-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'libuuid-devel-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python-libmount-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python-libmount-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'python-libmount-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-debuginfo-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-debuginfo-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-debuginfo-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-user-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-user-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'util-linux-user-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'uuidd-2.30.2-2.amzn2.0.9', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'uuidd-2.30.2-2.amzn2.0.9', 'cpu':'i686', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
{'reference':'uuidd-2.30.2-2.amzn2.0.9', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE}
];
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, "libblkid / libblkid-devel / libfdisk / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
amazon | linux | libmount-devel | p-cpe:/a:amazon:linux:libmount-devel |
amazon | linux | libsmartcols | p-cpe:/a:amazon:linux:libsmartcols |
amazon | linux | libsmartcols-devel | p-cpe:/a:amazon:linux:libsmartcols-devel |
amazon | linux | libuuid | p-cpe:/a:amazon:linux:libuuid |
amazon | linux | libuuid-devel | p-cpe:/a:amazon:linux:libuuid-devel |
amazon | linux | libblkid | p-cpe:/a:amazon:linux:libblkid |
amazon | linux | libblkid-devel | p-cpe:/a:amazon:linux:libblkid-devel |
amazon | linux | libfdisk | p-cpe:/a:amazon:linux:libfdisk |
amazon | linux | libfdisk-devel | p-cpe:/a:amazon:linux:libfdisk-devel |
amazon | linux | libmount | p-cpe:/a:amazon:linux:libmount |
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
5.1%