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.

According to the versions of the openldap packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - A NULL pointer dereference was found in OpenLDAP server     and was fixed in openldap 2.4.55, during a request for     renaming RDNs. An unauthenticated attacker could     remotely crash the slapd process by sending a specially     crafted request, causing a Denial of     Service.(CVE-2020-25692)

  - 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)

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.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2023-177 advisory.

    In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion  ...

    NOTE: https://bugs.openldap.org/show_bug.cgi?id=9454NOTE: trunk:
    https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0NOTE: REL_ENG     2.4.x: https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30     (CVE-2021-27212)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7713-1 advisory.

    It was discovered that OpenLDAP incorrectly handled X.509 DN parsing. A remote attacker could possibly use     this issue to cause OpenLDAP to crash, resulting in a denial of service. (CVE-2020-36229, CVE-2020-36230)

    Pasi Saarinen discovered that OpenLDAP incorrectly handled certain short timestamps. A remote attacker     could possibly use this issue to cause OpenLDAP to crash, resulting in a denial of service.
    (CVE-2021-27212)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of openldap installed on the remote host is prior to 2.4.44-25. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-2033 advisory.

    An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session     encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain     access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the     first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections. Depending     on the ACL configuration, this can affect different types of operations (searches, modifications, etc.).
    In other words, a successful authorization step completed by one user affects the authorization     requirement for a different user. (CVE-2019-13565)

    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 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  ...

    NOTE: https://bugs.openldap.org/show_bug.cgi?id=9454NOTE: trunk:
    https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0NOTE: REL_ENG     2.4.x: https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30     (CVE-2021-27212)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of openldap installed on the remote host is prior to 2.4.40-16.36. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2023-1741 advisory.

    An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session     encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain     access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the     first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections. Depending     on the ACL configuration, this can affect different types of operations (searches, modifications, etc.).
    In other words, a successful authorization step completed by one user affects the authorization     requirement for a different user. (CVE-2019-13565)

    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  ...

    NOTE: https://bugs.openldap.org/show_bug.cgi?id=9454NOTE: trunk:
    https://git.openldap.org/openldap/openldap/-/commit/3539fc33212b528c56b716584f2c2994af7c30b0NOTE: REL_ENG     2.4.x: https://git.openldap.org/openldap/openldap/-/commit/9badb73425a67768c09bcaed1a9c26c684af6c30     (CVE-2021-27212)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to the versions of the openldap packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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 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)

  - 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)

  - 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 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)

  - 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 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 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 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 assertion failure in slapd in the saslAuthzTo     validation, resulting in denial of     service.(CVE-2020-36222)

  - 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)

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.

According to the versions of the openldap packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - 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)

  - 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)

  - 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 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)

  - 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 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 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 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 assertion failure in slapd in the saslAuthzTo     validation, resulting in denial of     service.(CVE-2020-36222)

  - 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)

  - 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)

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.

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.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
153293	EulerOS 2.0 SP2 : openldap (EulerOS-SA-2021-2415)	Nessus	Huawei Local Security Checks	2021/9/14	2023/11/30	high
151384	EulerOS Virtualization 3.0.2.2 : openldap (EulerOS-SA-2021-2152)	Nessus	Huawei Local Security Checks	2021/7/6	2023/12/11	high
175068	Amazon Linux 2023 : openldap, openldap-clients, openldap-compat (ALAS2023-2023-177)	Nessus	Amazon Linux Local Security Checks	2023/5/3	2024/12/11	high
258033	Ubuntu 14.04 LTS : OpenLDAP vulnerabilities (USN-7713-1)	Nessus	Ubuntu Local Security Checks	2025/8/27	2025/8/27	high
175021	Amazon Linux 2 : openldap (ALAS-2023-2033)	Nessus	Amazon Linux Local Security Checks	2023/5/2	2024/12/11	high
175093	Amazon Linux AMI : openldap (ALAS-2023-1741)	Nessus	Amazon Linux Local Security Checks	2023/5/4	2024/12/11	high
148621	EulerOS Virtualization 2.9.0 : openldap (EulerOS-SA-2021-1753)	Nessus	Huawei Local Security Checks	2021/4/15	2024/1/4	high
151249	EulerOS Virtualization 3.0.6.6 : openldap (EulerOS-SA-2021-2029)	Nessus	Huawei Local Security Checks	2021/7/1	2023/12/11	high
504374	Siemens SIMATIC S7-1500 Reachable Assertion (CVE-2021-27212)	Tenable OT Security	Tenable.ot	2025/11/13	2025/11/13	high

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