Inefficient Regular Expression Complexity
CVE-2021-46823
Summary
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.
- LOW
- NETWORK
- NONE
- UNCHANGED
- NONE
- LOW
- NONE
- HIGH
CWE-1333 - Inefficient Regular Expression Complexity
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
References
Advisory Timeline
- Published