The version of expat installed on the remote host is prior to 2.4.3 / 2.4.5. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2022-050-01 advisory.
xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context. (CVE-2022-25235)
xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters into namespace URIs. (CVE-2022-25236)
In Expat (aka libexpat) before 2.4.5, an attacker can trigger stack exhaustion in build_model via a large nesting depth in the DTD element. (CVE-2022-25313)
In Expat (aka libexpat) before 2.4.5, there is an integer overflow in copyString. (CVE-2022-25314)
In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. (CVE-2022-25315)
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 70300
##
# (C) Tenable Network Security, Inc.
##
#
# The descriptive text and package checks in this plugin were
# extracted from Slackware Security Advisory SSA:2022-050-01. The text
# itself is copyright (C) Slackware Linux, Inc.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(158245);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/07");
script_cve_id(
"CVE-2022-25235",
"CVE-2022-25236",
"CVE-2022-25313",
"CVE-2022-25314",
"CVE-2022-25315"
);
script_name(english:"Slackware Linux 14.0 / 14.1 / 14.2 / 15.0 / current expat Multiple Vulnerabilities (SSA:2022-050-01)");
script_set_attribute(attribute:"synopsis", value:
"The remote Slackware Linux host is missing a security update to expat.");
script_set_attribute(attribute:"description", value:
"The version of expat installed on the remote host is prior to 2.4.3 / 2.4.5. It is, therefore, affected by multiple
vulnerabilities as referenced in the SSA:2022-050-01 advisory.
- xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks
for whether a UTF-8 character is valid in a certain context. (CVE-2022-25235)
- xmlparse.c in Expat (aka libexpat) before 2.4.5 allows attackers to insert namespace-separator characters
into namespace URIs. (CVE-2022-25236)
- In Expat (aka libexpat) before 2.4.5, an attacker can trigger stack exhaustion in build_model via a large
nesting depth in the DTD element. (CVE-2022-25313)
- In Expat (aka libexpat) before 2.4.5, there is an integer overflow in copyString. (CVE-2022-25314)
- In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. (CVE-2022-25315)
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:"solution", value:
"Upgrade the affected expat package.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-25315");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2022/02/16");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/22");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:expat");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.1");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.2");
script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:15.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Slackware Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Slackware/release", "Host/Slackware/packages");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("slackware.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) 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$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Slackware", cpu);
var flag = 0;
var constraints = [
{ 'fixed_version' : '2.4.3', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '14.0', 'service_pack' : '4_slack14.0', 'arch' : 'i486' },
{ 'fixed_version' : '2.4.3', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '14.0', 'service_pack' : '4_slack14.0', 'arch' : 'x86_64' },
{ 'fixed_version' : '2.4.3', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '14.1', 'service_pack' : '4_slack14.1', 'arch' : 'i486' },
{ 'fixed_version' : '2.4.3', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '14.1', 'service_pack' : '4_slack14.1', 'arch' : 'x86_64' },
{ 'fixed_version' : '2.4.3', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '14.2', 'service_pack' : '4_slack14.2', 'arch' : 'i586' },
{ 'fixed_version' : '2.4.3', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '14.2', 'service_pack' : '4_slack14.2', 'arch' : 'x86_64' },
{ 'fixed_version' : '2.4.5', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '15.0', 'service_pack' : '1_slack15.0', 'arch' : 'i586' },
{ 'fixed_version' : '2.4.5', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : '15.0', 'service_pack' : '1_slack15.0', 'arch' : 'x86_64' },
{ 'fixed_version' : '2.4.5', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : 'current', 'service_pack' : '1', 'arch' : 'i586' },
{ 'fixed_version' : '2.4.5', 'product' : 'expat', 'os_name' : 'Slackware Linux', 'os_version' : 'current', 'service_pack' : '1', 'arch' : 'x86_64' }
];
foreach constraint (constraints) {
var pkg_arch = constraint['arch'];
var arch = NULL;
if (pkg_arch == "x86_64") {
arch = pkg_arch;
}
if (slackware_check(osver:constraint['os_version'],
arch:arch,
pkgname:constraint['product'],
pkgver:constraint['fixed_version'],
pkgarch:pkg_arch,
pkgnum:constraint['service_pack'])) flag++;
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : slackware_report_get()
);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
slackware | slackware_linux | expat | p-cpe:/a:slackware:slackware_linux:expat |
slackware | slackware_linux | cpe:/o:slackware:slackware_linux | |
slackware | slackware_linux | 14.0 | cpe:/o:slackware:slackware_linux:14.0 |
slackware | slackware_linux | 14.1 | cpe:/o:slackware:slackware_linux:14.1 |
slackware | slackware_linux | 14.2 | cpe:/o:slackware:slackware_linux:14.2 |
slackware | slackware_linux | 15.0 | cpe:/o:slackware:slackware_linux:15.0 |