According to the versions of the systemd packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
It was discovered that a systemd service that uses DynamicUser property can get new privileges through the execution of SUID binaries, which would allow a cooperating process to create binaries owned by the service transient group with the setgid bit set. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future when the GID will be recycled.(CVE-2019-3844)
It was discovered that a systemd service that uses DynamicUser property can create a SUID/SGID binary that would be allowed to run as the transient service UID/GID even after the service is terminated. A local attacker may use this flaw to access resources that will be owned by a potentially different service in the future when the UID/GID will be recycled.(CVE-2019-3843)
In systemd before v242-rc4, it was discovered that pam_systemd does not properly sanitize the environment before using the XDG_SEAT variable. It is possible for an attacker, in some particular configurations, to set a XDG_SEAT environment variable which allows for commands to be checked against polkit policies using the ‘allow_active’ element rather than ‘allow_any’.(CVE-2019-3842)
Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(126288);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/06");
script_cve_id(
"CVE-2019-3842",
"CVE-2019-3843",
"CVE-2019-3844"
);
script_name(english:"EulerOS 2.0 SP8 : systemd (EulerOS-SA-2019-1661)");
script_summary(english:"Checks the rpm output for the updated packages.");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the systemd packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :
- It was discovered that a systemd service that uses
DynamicUser property can get new privileges through the
execution of SUID binaries, which would allow a
cooperating process to create binaries owned by the
service transient group with the setgid bit set. A
local attacker may use this flaw to access resources
that will be owned by a potentially different service
in the future when the GID will be
recycled.(CVE-2019-3844)
- It was discovered that a systemd service that uses
DynamicUser property can create a SUID/SGID binary that
would be allowed to run as the transient service
UID/GID even after the service is terminated. A local
attacker may use this flaw to access resources that
will be owned by a potentially different service in the
future when the UID/GID will be
recycled.(CVE-2019-3843)
- In systemd before v242-rc4, it was discovered that
pam_systemd does not properly sanitize the environment
before using the XDG_SEAT variable. It is possible for
an attacker, in some particular configurations, to set
a XDG_SEAT environment variable which allows for
commands to be checked against polkit policies using
the 'allow_active' element rather than
'allow_any'.(CVE-2019-3842)
Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
# https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2019-1661
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?edc44c28");
script_set_attribute(attribute:"solution", value:
"Update the affected systemd packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"patch_publication_date", value:"2019/06/27");
script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/27");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-container");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-journal-remote");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-pam");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-udev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:systemd-udev-compat");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2019-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
script_exclude_keys("Host/EulerOS/uvp_version");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(8)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP8", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("aarch64" >!< cpu) audit(AUDIT_ARCH_NOT, "aarch64", cpu);
flag = 0;
pkgs = ["systemd-239-3.h24.eulerosv2r8",
"systemd-container-239-3.h24.eulerosv2r8",
"systemd-devel-239-3.h24.eulerosv2r8",
"systemd-journal-remote-239-3.h24.eulerosv2r8",
"systemd-libs-239-3.h24.eulerosv2r8",
"systemd-pam-239-3.h24.eulerosv2r8",
"systemd-udev-239-3.h24.eulerosv2r8",
"systemd-udev-compat-239-3.h24.eulerosv2r8"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"8", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "systemd");
}
Vendor | Product | Version | CPE |
---|---|---|---|
huawei | euleros | systemd | p-cpe:/a:huawei:euleros:systemd |
huawei | euleros | systemd-container | p-cpe:/a:huawei:euleros:systemd-container |
huawei | euleros | systemd-devel | p-cpe:/a:huawei:euleros:systemd-devel |
huawei | euleros | systemd-journal-remote | p-cpe:/a:huawei:euleros:systemd-journal-remote |
huawei | euleros | systemd-libs | p-cpe:/a:huawei:euleros:systemd-libs |
huawei | euleros | systemd-pam | p-cpe:/a:huawei:euleros:systemd-pam |
huawei | euleros | systemd-udev | p-cpe:/a:huawei:euleros:systemd-udev |
huawei | euleros | systemd-udev-compat | p-cpe:/a:huawei:euleros:systemd-udev-compat |
huawei | euleros | 2.0 | cpe:/o:huawei:euleros:2.0 |