CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:C/I:N/A:N
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
64.3%
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:1050 advisory.
cups: Local privilege escalation to root due to insecure environment variable handling (CVE-2018-4180)
cups: Manipulation of cupsd.conf by a local attacker resulting in limited reads of arbitrary files as root (CVE-2018-4181)
cups: Predictable session cookie breaks CSRF protection (CVE-2018-4700)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2020:1050 and
# CentOS Errata and Security Advisory 2020:1050 respectively.
#
include('compat.inc');
if (description)
{
script_id(135325);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/13");
script_cve_id("CVE-2018-4180", "CVE-2018-4181", "CVE-2018-4700");
script_xref(name:"RHSA", value:"2020:1050");
script_name(english:"CentOS 7 : cups (CESA-2020:1050)");
script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2020:1050 advisory.
- cups: Local privilege escalation to root due to insecure
environment variable handling (CVE-2018-4180)
- cups: Manipulation of cupsd.conf by a local attacker
resulting in limited reads of arbitrary files as root
(CVE-2018-4181)
- cups: Predictable session cookie breaks CSRF protection
(CVE-2018-4700)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
# https://lists.centos.org/pipermail/centos-cr-announce/2020-April/012427.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?53855bc8");
script_set_attribute(attribute:"solution", value:
"Update the affected cups packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:N/A:N");
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-2018-4181");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2018-4180");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/01/11");
script_set_attribute(attribute:"patch_publication_date", value:"2020/04/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/10");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups-client");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups-filesystem");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups-ipptool");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups-libs");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:cups-lpd");
script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:7");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CentOS Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/CentOS/release", "Host/CentOS/rpm-list");
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/CentOS/release");
if (isnull(release) || "CentOS" >!< release) audit(AUDIT_OS_NOT, "CentOS");
os_ver = pregmatch(pattern: "CentOS(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "CentOS");
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "CentOS 7.x", "CentOS " + os_ver);
if (!get_kb_item("Host/CentOS/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "CentOS", cpu);
flag = 0;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-1.6.3-43.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-client-1.6.3-43.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-devel-1.6.3-43.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-filesystem-1.6.3-43.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-ipptool-1.6.3-43.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-libs-1.6.3-43.el7")) flag++;
if (rpm_check(release:"CentOS-7", cpu:"x86_64", reference:"cups-lpd-1.6.3-43.el7")) flag++;
if (flag)
{
cr_plugin_caveat = '\n' +
'NOTE: The security advisory associated with this vulnerability has a\n' +
'fixed package version that may only be available in the continuous\n' +
'release (CR) repository for CentOS, until it is present in the next\n' +
'point release of CentOS.\n\n' +
'If an equal or higher package level does not exist in the baseline\n' +
'repository for your major version of CentOS, then updates from the CR\n' +
'repository will need to be applied in order to address the\n' +
'vulnerability.\n';
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get() + cr_plugin_caveat
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "cups / cups-client / cups-devel / cups-filesystem / cups-ipptool / etc");
}
Vendor | Product | Version | CPE |
---|---|---|---|
centos | centos | 7 | cpe:/o:centos:centos:7 |
centos | centos | cups | p-cpe:/a:centos:centos:cups |
centos | centos | cups-filesystem | p-cpe:/a:centos:centos:cups-filesystem |
centos | centos | cups-client | p-cpe:/a:centos:centos:cups-client |
centos | centos | cups-libs | p-cpe:/a:centos:centos:cups-libs |
centos | centos | cups-lpd | p-cpe:/a:centos:centos:cups-lpd |
centos | centos | cups-ipptool | p-cpe:/a:centos:centos:cups-ipptool |
centos | centos | cups-devel | p-cpe:/a:centos:centos:cups-devel |
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:C/I:N/A:N
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
64.3%