CVE-2019-13565
HighCVSS 7.5Exploitation Probability (EPSS)
Very high risk92th percentile - higher than 92% of all known CVEs
Summary
An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections.
Risk Assessment
This could lead to unauthorized access to data or operations that should be denied, compromising access control integrity.
Recommendation
Update OpenLDAP to version 2.4.48 or later, which includes a fix for this issue.
Other vulnerabilities in OpenLDAP
See all- CVE-2020-36230High
A flaw in OpenLDAP before 2.4.57 leads to an assertion failure in slapd during X.509 DN parsing in decode.c (ber_next_element), resulting in denial of service.
- CVE-2020-36229High
A flaw was discovered in OpenLDAP before 2.4.57 in ldap_X509dn2bv leading to a slapd crash in X.509 DN parsing in ad_keystring, resulting in denial of service.
- CVE-2020-36228High
An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.
- CVE-2020-36227High
A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.
- CVE-2020-36226High
A flaw was discovered in OpenLDAP before 2.4.57 leading to a memch->bv_len miscalculation and slapd crash in the saslAuthzTo processing, resulting in denial of service.
- CVE-2020-36225High
A flaw was discovered in OpenLDAP before 2.4.57 leading to a double free and slapd crash in the saslAuthzTo processing, resulting in denial of service.
- CVE-2020-36224High
A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the saslAuthzTo processing, resulting in denial of service.
- CVE-2020-36223High
A flaw was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Values Return Filter control handling, resulting in denial of service (double free and out-of-bounds read).
- CVE-2020-36222High
A flaw was discovered in OpenLDAP before 2.4.57 leading to an assertion failure in slapd in the saslAuthzTo validation, resulting in denial of service.
- CVE-2020-36221High
An integer underflow was discovered in OpenLDAP before 2.4.57 leading to slapd crashes in the Certificate Exact Assertion processing, resulting in denial of service (schema_init.c serialNumberAndIssuerCheck).
Original NVD description (English source)
An issue was discovered in OpenLDAP 2.x before 2.4.48. When using SASL authentication and session encryption, and relying on the SASL security layers in slapd access controls, it is possible to obtain access that would otherwise be denied via a simple bind for any identity covered in those ACLs. After the first SASL bind is completed, the sasl_ssf value is retained for all new non-SASL connections. Depending on the ACL configuration, this can affect different types of operations (searches, modifications, etc.). In other words, a successful authorization step completed by one user affects the authorization requirement for a different user.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS