According to the versions of the openldap packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :
An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).(CVE-2020-36221)
A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo validation, resulting in denial of service.(CVE-2020-36222)
A flaw was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Values Return Filter control handling, resulting in denial of service (double free and out-of-bounds read).(CVE-2020-36223)
A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the saslAuthzTo processing, resulting in denial of service.(CVE-2020-36224)
A flaw was discovered in OpenLDAP before 2.4.57 leading to a double free and slapd crash in the saslAuthzTo processing, resulting in denial of service.(CVE-2020-36225)
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.(CVE-2020-36226)
A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.(CVE-2020-36227)
An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.(CVE-2020-36228)
A flaw was discovered in ldap_X509dn2bv in OpenLDAP before 2.4.57 leading to a slapd crash in the X.509 DN parsing in ad_keystring, resulting in denial of service.(CVE-2020-36229)
A flaw was discovered in OpenLDAP before 2.4.57 leading in an assertion failure in slapd in the X.509 DN parsing in decode.c ber_next_element, resulting in denial of service.(CVE-2020-36230)
In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the issuerAndThisUpdateCheck function via a crafted packet, resulting in a denial of service (daemon exit) via a short timestamp. This is related to schema_init.c and checkTime.(CVE-2021-27212)
A flaw was found in OpenLDAP. This flaw allows an attacker who can send a malicious packet to be processed by OpenLDAP’s slapd server, to trigger an assertion failure. The highest threat from this vulnerability is to system availability.(CVE-2020-25709)
A flaw was found in OpenLDAP in versions before 2.4.56.
This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.(CVE-2020-25710)
Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(153293);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/30");
script_cve_id(
"CVE-2020-25709",
"CVE-2020-25710",
"CVE-2020-36221",
"CVE-2020-36222",
"CVE-2020-36223",
"CVE-2020-36224",
"CVE-2020-36225",
"CVE-2020-36226",
"CVE-2020-36227",
"CVE-2020-36228",
"CVE-2020-36229",
"CVE-2020-36230",
"CVE-2021-27212"
);
script_name(english:"EulerOS 2.0 SP2 : openldap (EulerOS-SA-2021-2415)");
script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
script_set_attribute(attribute:"description", value:
"According to the versions of the openldap packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :
- An integer underflow was discovered in OpenLDAP before
2.4.57 leading to slapd crashes in the Certificate
Exact Assertion processing, resulting in denial of
service (schema_init.c
serialNumberAndIssuerCheck).(CVE-2020-36221)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
to an assertion failure in slapd in the saslAuthzTo
validation, resulting in denial of
service.(CVE-2020-36222)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
to a slapd crash in the Values Return Filter control
handling, resulting in denial of service (double free
and out-of-bounds read).(CVE-2020-36223)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
to an invalid pointer free and slapd crash in the
saslAuthzTo processing, resulting in denial of
service.(CVE-2020-36224)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
to a double free and slapd crash in the saslAuthzTo
processing, resulting in denial of
service.(CVE-2020-36225)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
to a memch->bv_len miscalculation and slapd crash in
the saslAuthzTo processing, resulting in denial of
service.(CVE-2020-36226)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
to an infinite loop in slapd with the cancel_extop
Cancel operation, resulting in denial of
service.(CVE-2020-36227)
- An integer underflow was discovered in OpenLDAP before
2.4.57 leading to a slapd crash in the Certificate List
Exact Assertion processing, resulting in denial of
service.(CVE-2020-36228)
- A flaw was discovered in ldap_X509dn2bv in OpenLDAP
before 2.4.57 leading to a slapd crash in the X.509 DN
parsing in ad_keystring, resulting in denial of
service.(CVE-2020-36229)
- A flaw was discovered in OpenLDAP before 2.4.57 leading
in an assertion failure in slapd in the X.509 DN
parsing in decode.c ber_next_element, resulting in
denial of service.(CVE-2020-36230)
- In OpenLDAP through 2.4.57 and 2.5.x through
2.5.1alpha, an assertion failure in slapd can occur in
the issuerAndThisUpdateCheck function via a crafted
packet, resulting in a denial of service (daemon exit)
via a short timestamp. This is related to schema_init.c
and checkTime.(CVE-2021-27212)
- A flaw was found in OpenLDAP. This flaw allows an
attacker who can send a malicious packet to be
processed by OpenLDAP's slapd server, to trigger an
assertion failure. The highest threat from this
vulnerability is to system
availability.(CVE-2020-25709)
- A flaw was found in OpenLDAP in versions before 2.4.56.
This flaw allows an attacker who sends a malicious
packet processed by OpenLDAP to force a failed
assertion in csnNormalize23(). The highest threat from
this vulnerability is to system
availability.(CVE-2020-25710)
Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
# https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-2415
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ad130934");
script_set_attribute(attribute:"solution", value:
"Update the affected openldap packages.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-27212");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"patch_publication_date", value:"2021/09/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/14");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-clients");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:openldap-servers");
script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
script_set_attribute(attribute:"generated_plugin", value:"current");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Huawei 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/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
script_exclude_keys("Host/EulerOS/uvp_version");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");
sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");
uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "EulerOS UVP " + uvp);
if (!get_kb_item("Host/EulerOS/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$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);
flag = 0;
pkgs = ["openldap-2.4.44-5.h10",
"openldap-clients-2.4.44-5.h10",
"openldap-devel-2.4.44-5.h10",
"openldap-servers-2.4.44-5.h10"];
foreach (pkg in pkgs)
if (rpm_check(release:"EulerOS-2.0", sp:"2", reference:pkg)) flag++;
if (flag)
{
security_report_v4(
port : 0,
severity : SECURITY_WARNING,
extra : rpm_report_get()
);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "openldap");
}
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25709
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25710
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36221
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36222
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36223
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36224
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36225
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36226
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36227
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36228
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36229
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36230
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-27212
www.nessus.org/u?ad130934