CVE-2019-13057
MediumCVSS 4.9Exploitation Probability (EPSS)
High risk89th percentile - higher than 89% of all known CVEs
Summary
An issue was discovered in the server in OpenLDAP before 2.4.48. When the server administrator delegates rootDN (database admin) privileges for certain databases but wants to maintain isolation (e.g., for multi-tenant deployments), slapd does not properly stop a rootDN from requesting authorization as an identity from another database during a SASL bind or with a proxyAuthz (RFC 4370) control. (It is not a common configuration to deploy a system where the server administrator and a DB administrator enjoy different levels of trust.)
Risk Assessment
In multi-tenant environments where server admin and DB admin have different trust levels, rootDN may gain unauthorized access to other databases, breaking isolation and potentially compromising data confidentiality.
Recommendation
Update OpenLDAP to version 2.4.48 or later. If using rootDN delegation, review configuration carefully and consider restricting privileges.
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 the server in OpenLDAP before 2.4.48. When the server administrator delegates rootDN (database admin) privileges for certain databases but wants to maintain isolation (e.g., for multi-tenant deployments), slapd does not properly stop a rootDN from requesting authorization as an identity from another database during a SASL bind or with a proxyAuthz (RFC 4370) control. (It is not a common configuration to deploy a system where the server administrator and a DB administrator enjoy different levels of trust.)
Vulnerability data from NVD (NIST) · CISA KEV · EPSS