CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
93.0%
The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-2935 advisory.
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)
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 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 Debian Security Advisory dla-2935. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(158676);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/06");
script_cve_id(
"CVE-2022-23852",
"CVE-2022-25235",
"CVE-2022-25236",
"CVE-2022-25313",
"CVE-2022-25315"
);
script_name(english:"Debian DLA-2935-1 : expat - LTS security update");
script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-2935 advisory.
- Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with
a nonzero XML_CONTEXT_BYTES. (CVE-2022-23852)
- 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 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:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1005894");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/expat");
script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-2935");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-23852");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-25235");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-25236");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-25313");
script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2022-25315");
script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/expat");
script_set_attribute(attribute:"solution", value:
"Upgrade the expat packages.
For Debian 9 stretch, these problems have been fixed in version 2.2.0-2+deb9u5.");
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:"2022/01/24");
script_set_attribute(attribute:"patch_publication_date", value:"2022/03/07");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/07");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:expat");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lib64expat1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lib64expat1-dev");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexpat1");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libexpat1-dev");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Debian 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/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include('audit.inc');
include('debian_package.inc');
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', 'Debian ' + release);
var 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, 'Debian', cpu);
var pkgs = [
{'release': '9.0', 'prefix': 'expat', 'reference': '2.2.0-2+deb9u5'},
{'release': '9.0', 'prefix': 'lib64expat1', 'reference': '2.2.0-2+deb9u5'},
{'release': '9.0', 'prefix': 'lib64expat1-dev', 'reference': '2.2.0-2+deb9u5'},
{'release': '9.0', 'prefix': 'libexpat1', 'reference': '2.2.0-2+deb9u5'},
{'release': '9.0', 'prefix': 'libexpat1-dev', 'reference': '2.2.0-2+deb9u5'}
];
var flag = 0;
foreach package_array ( pkgs ) {
var release = NULL;
var prefix = NULL;
var reference = NULL;
if (!empty_or_null(package_array['release'])) release = package_array['release'];
if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (release && prefix && reference) {
if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
}
}
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : deb_report_get()
);
exit(0);
}
else
{
var tested = deb_pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'expat / lib64expat1 / lib64expat1-dev / libexpat1 / libexpat1-dev');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23852
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25235
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25236
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25313
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25315
bugs.debian.org/cgi-bin/bugreport.cgi?bug=1005894
packages.debian.org/source/stretch/expat
security-tracker.debian.org/tracker/CVE-2022-23852
security-tracker.debian.org/tracker/CVE-2022-25235
security-tracker.debian.org/tracker/CVE-2022-25236
security-tracker.debian.org/tracker/CVE-2022-25313
security-tracker.debian.org/tracker/CVE-2022-25315
security-tracker.debian.org/tracker/source-package/expat
www.debian.org/lts/security/2022/dla-2935
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
93.0%