CVE-2021-46823

Advisory

Python-ldap 3.4.0 includes a fix for CVE-2021-46823: versions before 3.4.0 are 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.
https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm

Affected package

Affected versions

Fixed versions

Vulnerability changelog

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. See CVE-2021-46823.


MISC:https://exchange.xforce.ibmcloud.com/vulnerabilities/221507: https://exchange.xforce.ibmcloud.com/vulnerabilities/221507
MISC:https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm: https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm

Resources

• https://exchange.xforce.ibmcloud.com/vulnerabilities/221507
• https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46823