7.8 High
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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8 High
AI Score
Confidence
High
0.273 Low
EPSS
Percentile
96.8%
The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2024:0010 advisory.
A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible escalation of privileges or denial of service. (CVE-2023-5367)
A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)
A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive information. (CVE-2023-6478)
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 package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2024:0010.
##
include('compat.inc');
if (description)
{
script_id(187636);
script_version("1.0");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/04");
script_cve_id("CVE-2023-5367", "CVE-2023-6377", "CVE-2023-6478");
script_xref(name:"ALSA", value:"2024:0010");
script_name(english:"AlmaLinux 9 : tigervnc (ALSA-2024:0010)");
script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2024:0010 advisory.
- A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect
calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function
in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible
escalation of privileges or denial of service. (CVE-2023-5367)
- A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to
a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or
possible remote code execution in cases where X11 forwarding is involved. (CVE-2023-6377)
- A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or
RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive
information. (CVE-2023-6478)
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://errata.almalinux.org/9/ALSA-2024-0010.html");
script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
script_set_cvss_base_vector("CVSS2#AV:N/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-2023-6478");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2023-6377");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(125, 190, 787);
script_set_attribute(attribute:"vuln_publication_date", value:"2023/10/25");
script_set_attribute(attribute:"patch_publication_date", value:"2024/01/02");
script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc-icons");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc-license");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc-selinux");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc-server");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc-server-minimal");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:tigervnc-server-module");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::appstream");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::baseos");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::crb");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::highavailability");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::nfv");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::realtime");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::resilientstorage");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap_hana");
script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::supplementary");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Alma 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");
script_require_keys("Host/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");
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/AlmaLinux/release');
if (isnull(os_release) || 'AlmaLinux' >!< os_release) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_ver = pregmatch(pattern: "AlmaLinux release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
os_ver = os_ver[1];
if (! preg(pattern:"^9([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.x', 'AlmaLinux ' + os_ver);
if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);
var pkgs = [
{'reference':'tigervnc-1.13.1-3.el9_3.3.alma.1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-1.13.1-3.el9_3.3.alma.1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-icons-1.13.1-3.el9_3.3.alma.1', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-license-1.13.1-3.el9_3.3.alma.1', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-selinux-1.13.1-3.el9_3.3.alma.1', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-server-1.13.1-3.el9_3.3.alma.1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-server-1.13.1-3.el9_3.3.alma.1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-server-minimal-1.13.1-3.el9_3.3.alma.1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-server-minimal-1.13.1-3.el9_3.3.alma.1', 'cpu':'x86_64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-server-module-1.13.1-3.el9_3.3.alma.1', 'cpu':'aarch64', 'release':'9', 'rpm_spec_vers_cmp':TRUE},
{'reference':'tigervnc-server-module-1.13.1-3.el9_3.3.alma.1', 'cpu':'x86_64', 'release':'9', '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 = 'Alma-' + 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, 'tigervnc / tigervnc-icons / tigervnc-license / tigervnc-selinux / etc');
}
Vendor | Product | Version | CPE |
---|---|---|---|
alma | linux | tigervnc | p-cpe:/a:alma:linux:tigervnc |
alma | linux | tigervnc-icons | p-cpe:/a:alma:linux:tigervnc-icons |
alma | linux | tigervnc-license | p-cpe:/a:alma:linux:tigervnc-license |
alma | linux | tigervnc-selinux | p-cpe:/a:alma:linux:tigervnc-selinux |
alma | linux | tigervnc-server | p-cpe:/a:alma:linux:tigervnc-server |
alma | linux | tigervnc-server-minimal | p-cpe:/a:alma:linux:tigervnc-server-minimal |
alma | linux | tigervnc-server-module | p-cpe:/a:alma:linux:tigervnc-server-module |
alma | linux | 9 | cpe:/o:alma:linux:9 |
alma | linux | 9 | cpe:/o:alma:linux:9::appstream |
alma | linux | 9 | cpe:/o:alma:linux:9::baseos |
7.8 High
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:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8 High
AI Score
Confidence
High
0.273 Low
EPSS
Percentile
96.8%