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CVE-2021-46823

Published: 18 June 2022

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.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
python-ldap
Launchpad, Ubuntu, Debian
upstream
Released (3.4.0-1)
bionic
Released (3.0.0-1ubuntu0.2)
focal
Released (3.2.0-4ubuntu2.1)
impish
Released (3.2.0-4ubuntu5.1)
jammy
Released (3.2.0-4ubuntu7.1)
Patches:
upstream: https://github.com/python-ldap/python-ldap/pull/444/commits/31dbb4b075b4710e3adac7ac998a02aaeb2c5d3d

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H