CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
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
EPSS
Percentile
93.0%
The remote host is affected by the vulnerability described in GLSA-202209-24 (Expat: Multiple Vulnerabilities)
In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
(CVE-2021-45960)
In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for m_groupSize. (CVE-2021-46143)
addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22822)
build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22823)
defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
(CVE-2022-22824)
lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22825)
nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
(CVE-2022-22826)
storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22827)
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)
Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. (CVE-2022-23990)
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)
libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c. (CVE-2022-40674)
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.
#
# @NOAGENT@
#
# The descriptive text and package checks in this plugin were
# extracted from Gentoo Linux Security Advisory GLSA 202209-24.
#
# The advisory text is Copyright (C) 2001-2021 Gentoo Foundation, Inc.
# and licensed under the Creative Commons - Attribution / Share Alike
# license. See http://creativecommons.org/licenses/by-sa/3.0/
#
include('compat.inc');
if (description)
{
script_id(165540);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/10");
script_cve_id(
"CVE-2021-45960",
"CVE-2021-46143",
"CVE-2022-22822",
"CVE-2022-22823",
"CVE-2022-22824",
"CVE-2022-22825",
"CVE-2022-22826",
"CVE-2022-22827",
"CVE-2022-23852",
"CVE-2022-23990",
"CVE-2022-25235",
"CVE-2022-25236",
"CVE-2022-25313",
"CVE-2022-25314",
"CVE-2022-25315",
"CVE-2022-40674"
);
script_name(english:"GLSA-202209-24 : Expat: Multiple Vulnerabilities");
script_set_attribute(attribute:"synopsis", value:
"");
script_set_attribute(attribute:"description", value:
"The remote host is affected by the vulnerability described in GLSA-202209-24 (Expat: Multiple Vulnerabilities)
- In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in
xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).
(CVE-2021-45960)
- In doProlog in xmlparse.c in Expat (aka libexpat) before 2.4.3, an integer overflow exists for
m_groupSize. (CVE-2021-46143)
- addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22822)
- build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22823)
- defineAttribute in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
(CVE-2022-22824)
- lookup in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22825)
- nextScaffoldPart in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
(CVE-2022-22826)
- storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. (CVE-2022-22827)
- 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)
- Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function. (CVE-2022-23990)
- 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)
- libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c. (CVE-2022-40674)
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://security.gentoo.org/glsa/202209-24");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=791703");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=830422");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=831918");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=833431");
script_set_attribute(attribute:"see_also", value:"https://bugs.gentoo.org/show_bug.cgi?id=870097");
script_set_attribute(attribute:"solution", value:
"All Expat users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose >=dev-libs/expat-2.4.9");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
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-2021-45960");
script_set_attribute(attribute:"cvss3_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:"2022/01/01");
script_set_attribute(attribute:"patch_publication_date", value:"2022/09/29");
script_set_attribute(attribute:"plugin_publication_date", value:"2022/09/29");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:gentoo:linux:expat");
script_set_attribute(attribute:"cpe", value:"cpe:/o:gentoo:linux");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Gentoo 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/Gentoo/release", "Host/Gentoo/qpkg-list");
exit(0);
}
include("qpkg.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Gentoo/release")) audit(AUDIT_OS_NOT, "Gentoo");
if (!get_kb_item("Host/Gentoo/qpkg-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
var flag = 0;
var packages = [
{
'name' : "dev-libs/expat",
'unaffected' : make_list("ge 2.4.9", "lt 2.0.0"),
'vulnerable' : make_list("lt 2.4.9")
}
];
foreach package( packages ) {
if (isnull(package['unaffected'])) package['unaffected'] = make_list();
if (isnull(package['vulnerable'])) package['vulnerable'] = make_list();
if (qpkg_check(package: package['name'] , unaffected: package['unaffected'], vulnerable: package['vulnerable'])) flag++;
}
# This plugin has a different number of unaffected and vulnerable versions for
# one or more packages. To ensure proper detection, a separate line should be
# used for each fixed/vulnerable version pair.
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : qpkg_report_get()
);
exit(0);
}
else
{
qpkg_tests = list_uniq(qpkg_tests);
var tested = qpkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "Expat");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-45960
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46143
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22822
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22823
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22824
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22825
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22826
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-22827
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23852
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23990
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-2022-25314
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-25315
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-40674
bugs.gentoo.org/show_bug.cgi?id=791703
bugs.gentoo.org/show_bug.cgi?id=830422
bugs.gentoo.org/show_bug.cgi?id=831918
bugs.gentoo.org/show_bug.cgi?id=833431
bugs.gentoo.org/show_bug.cgi?id=870097
security.gentoo.org/glsa/202209-24
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
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
EPSS
Percentile
93.0%