python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.

The version of python-ldap installed on the remote host is prior to 2.4.15-2. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2406 advisory.

  - python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted     schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema     parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability     to cause a denial of service condition. (CVE-2021-46823)

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

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

  - python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted     schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema     parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability     to cause a denial of service condition. (CVE-2021-46823)

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 python-ldap package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted     schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema     parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability     to cause a denial of service condition. (CVE-2021-46823)

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 python-ldap packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted     schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema     parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability     to cause a denial of service condition. (CVE-2021-46823)

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 python-ldap package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted     schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema     parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability     to cause a denial of service condition. (CVE-2021-46823)

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.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 21.10 / 22.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-5508-1 advisory.

  - python-ldap before 3.4.0 is vulnerable to a denial of service when ldap.schema is used for untrusted     schema definitions, because of a regular expression denial of service (ReDoS) flaw in the LDAP schema     parser. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability     to cause a denial of service condition. (CVE-2021-46823)

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

ID	Name	Product	Family	Severity
187838	Amazon Linux 2 : python-ldap (ALAS-2024-2406)	Nessus	Amazon Linux Local Security Checks	medium
169808	EulerOS Virtualization 2.9.1 : python-ldap (EulerOS-SA-2023-1200)	Nessus	Huawei Local Security Checks	medium
169796	EulerOS Virtualization 2.9.0 : python-ldap (EulerOS-SA-2023-1230)	Nessus	Huawei Local Security Checks	medium
169400	EulerOS Virtualization 2.10.0 : python-ldap (EulerOS-SA-2022-2914)	Nessus	Huawei Local Security Checks	medium
169360	EulerOS Virtualization 2.10.1 : python-ldap (EulerOS-SA-2022-2940)	Nessus	Huawei Local Security Checks	medium
167425	EulerOS 2.0 SP9 : python-ldap (EulerOS-SA-2022-2739)	Nessus	Huawei Local Security Checks	medium
167423	EulerOS 2.0 SP9 : python-ldap (EulerOS-SA-2022-2774)	Nessus	Huawei Local Security Checks	medium
166849	EulerOS 2.0 SP10 : python-ldap (EulerOS-SA-2022-2662)	Nessus	Huawei Local Security Checks	medium
166830	EulerOS 2.0 SP10 : python-ldap (EulerOS-SA-2022-2694)	Nessus	Huawei Local Security Checks	medium
162994	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS : Python LDAP vulnerability (USN-5508-1)	Nessus	Ubuntu Local Security Checks	medium

Detections

Analytics

CVE-2021-46823

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium