CVE-2021-46823
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.
Does this matter?
Lower severity and a low EPSS score (1.90%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.90% probability · 78th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-1333
- Affected
- python-ldap/python-ldap
- Source
- cve@mitre.org
References
- https://exchange.xforce.ibmcloud.com/vulnerabilities/221507Third Party Advisory, VDB Entry
- https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcmThird Party Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/221507Third Party Advisory, VDB Entry
- https://github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcmThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.