Vulnerability in Python-Ldap
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. By sending crafted regex input, a remote authenticated attacker could exploit this vulnerability to cause a denial of service condition.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.019 (78.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.019 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/python-ldap/python-ldap/security/advisories/GHSA-r8wq-qrxc-hmcm (Third Party Advisory)
- exchange.xforce.ibmcloud.com/vulnerabilities/221507 (VDB Entry, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-46823?
- CVE-2021-46823 is a medium-severity vulnerability in Python-Ldap, classified under Inefficient Regular Expression Complexity. CVSS score: 6.5/10. Published 2022-06-18.
- How severe is CVE-2021-46823?
- Medium severity. CVSS v3 base score is 6.5 out of 10.