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
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
90.1%
The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:14729-1 advisory.
The xmlParserHandlePEReference function in parser.c in libxml2 before 2.9.2, as used in Web Listener in Oracle HTTP Server in Oracle Fusion Middleware 11.1.1.7.0, 12.1.2.0, and 12.1.3.0 and other products, loads external parameter entities regardless of whether entity substitution or validation is enabled, which allows remote attackers to cause a denial of service (resource consumption) via a crafted XML document. (CVE-2014-0191)
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs. (CVE-2019-19956)
xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
(CVE-2019-20388)
GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c. The issue has been fixed in commit 50f06b3e. (CVE-2020-24977)
xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation. (CVE-2020-7595)
There’s a flaw in libxml2’s xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability. (CVE-2021-3516)
There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application. (CVE-2021-3517)
There’s a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability. (CVE-2021-3518)
A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability. (CVE-2021-3537)
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 package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2021:14729-1. The text itself
# is copyright (C) SUSE.
##
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(150579);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/26");
script_cve_id(
"CVE-2014-0191",
"CVE-2019-19956",
"CVE-2019-20388",
"CVE-2020-7595",
"CVE-2020-24977",
"CVE-2021-3516",
"CVE-2021-3517",
"CVE-2021-3518",
"CVE-2021-3537"
);
script_xref(name:"SuSE", value:"SUSE-SU-2021:14729-1");
script_xref(name:"IAVA", value:"2015-A-0247-S");
script_xref(name:"IAVA", value:"2020-A-0326");
script_name(english:"SUSE SLES11 Security Update : libxml2 (SUSE-SU-2021:14729-1)");
script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in
the SUSE-SU-2021:14729-1 advisory.
- The xmlParserHandlePEReference function in parser.c in libxml2 before 2.9.2, as used in Web Listener in
Oracle HTTP Server in Oracle Fusion Middleware 11.1.1.7.0, 12.1.2.0, and 12.1.3.0 and other products,
loads external parameter entities regardless of whether entity substitution or validation is enabled,
which allows remote attackers to cause a denial of service (resource consumption) via a crafted XML
document. (CVE-2014-0191)
- xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to
newDoc->oldNs. (CVE-2019-19956)
- xmlSchemaPreRun in xmlschemas.c in libxml2 2.9.10 allows an xmlSchemaValidateStream memory leak.
(CVE-2019-20388)
- GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at
libxml2/entities.c. The issue has been fixed in commit 50f06b3e. (CVE-2020-24977)
- xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file
situation. (CVE-2020-7595)
- There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted
file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to
confidentiality, integrity, and availability. (CVE-2021-3516)
- There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker
who is able to supply a crafted file to be processed by an application linked with the affected
functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to
application availability, with some potential impact to confidentiality and integrity if an attacker is
able to use memory information to further exploit the application. (CVE-2021-3517)
- There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to
be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact
from this flaw is to confidentiality, integrity, and availability. (CVE-2021-3518)
- A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while
parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery
mode and post-validated, the flaw could be used to crash the application. The highest threat from this
vulnerability is to system availability. (CVE-2021-3537)
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://bugzilla.suse.com/1159928");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1161517");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1161521");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1176179");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1185408");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1185409");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1185410");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/1185698");
# https://lists.suse.com/pipermail/sle-security-updates/2021-May/008797.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?054f377b");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2014-0191");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-19956");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2019-20388");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-24977");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-7595");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3516");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3517");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3518");
script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3537");
script_set_attribute(attribute:"solution", value:
"Update the affected libxml2, libxml2-32bit, libxml2-doc and / or libxml2-python packages.");
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:R/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-2021-3517");
script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-3518");
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:"2014/04/24");
script_set_attribute(attribute:"patch_publication_date", value:"2021/05/19");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/10");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxml2-python");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");
exit(0);
}
include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES11', 'SUSE ' + os_ver);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'SUSE ' + os_ver, cpu);
sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);
pkgs = [
{'reference':'libxml2-2.7.6-0.77.36', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},
{'reference':'libxml2-32bit-2.7.6-0.77.36', 'sp':'4', 'cpu':'s390x', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},
{'reference':'libxml2-32bit-2.7.6-0.77.36', 'sp':'4', 'cpu':'x86_64', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},
{'reference':'libxml2-doc-2.7.6-0.77.36', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},
{'reference':'libxml2-python-2.7.6-0.77.36', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'SLES_SAP-release-11.4'},
{'reference':'libxml2-2.7.6-0.77.36', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'},
{'reference':'libxml2-32bit-2.7.6-0.77.36', 'sp':'4', 'cpu':'s390x', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'},
{'reference':'libxml2-32bit-2.7.6-0.77.36', 'sp':'4', 'cpu':'x86_64', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'},
{'reference':'libxml2-doc-2.7.6-0.77.36', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'},
{'reference':'libxml2-python-2.7.6-0.77.36', 'sp':'4', 'release':'SLES11', 'rpm_spec_vers_cmp':TRUE, 'exists_check':'sles-release-11.4'}
];
flag = 0;
foreach package_array ( pkgs ) {
reference = NULL;
release = NULL;
sp = NULL;
cpu = NULL;
exists_check = NULL;
rpm_spec_vers_cmp = NULL;
if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
if (!empty_or_null(package_array['release'])) release = 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['exists_check'])) exists_check = package_array['exists_check'];
if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
if (reference && release && exists_check) {
if (rpm_exists(release:release, rpm:exists_check) && rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
}
else if (reference && release) {
if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
}
}
if (flag)
{
ltss_plugin_caveat = '\n' +
'NOTE: This vulnerability check contains fixes that apply to\n' +
'packages only available in SUSE Enterprise Linux Server LTSS\n' +
'repositories. Access to these package security updates require\n' +
'a paid SUSE LTSS subscription.\n';
security_report_v4(
port : 0,
severity : SECURITY_HOLE,
extra : rpm_report_get() + ltss_plugin_caveat
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'libxml2 / libxml2-32bit / libxml2-doc / libxml2-python');
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0191
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19956
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-20388
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-24977
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-7595
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3516
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3517
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3518
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3537
www.nessus.org/u?054f377b
bugzilla.suse.com/1159928
bugzilla.suse.com/1161517
bugzilla.suse.com/1161521
bugzilla.suse.com/1176179
bugzilla.suse.com/1185408
bugzilla.suse.com/1185409
bugzilla.suse.com/1185410
bugzilla.suse.com/1185698
www.suse.com/security/cve/CVE-2014-0191
www.suse.com/security/cve/CVE-2019-19956
www.suse.com/security/cve/CVE-2019-20388
www.suse.com/security/cve/CVE-2020-24977
www.suse.com/security/cve/CVE-2020-7595
www.suse.com/security/cve/CVE-2021-3516
www.suse.com/security/cve/CVE-2021-3517
www.suse.com/security/cve/CVE-2021-3518
www.suse.com/security/cve/CVE-2021-3537
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
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
90.1%