389-ds-base schema.c schema_attr_enum_callback heap-based overflow

Summaryinfo

A vulnerability was found in 389-ds-base. It has been classified as critical. The impacted element is the function schema_attr_enum_callback of the file schema.c. The manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2025-14905. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in 389-ds-base (unknown version) and classified as critical. This issue affects the function schema_attr_enum_callback of the file schema.c. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A flaw was found in the 389-ds-base server. A heap buffer overflow vulnerability exists in the `schema_attr_enum_callback` function within the `schema.c` file. This occurs because the code incorrectly calculates the buffer size by summing alias string lengths without accounting for additional formatting characters. When a large number of aliases are processed, this oversight can lead to a heap overflow, potentially allowing a remote attacker to cause a Denial of Service (DoS) or achieve Remote Code Execution (RCE).

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2025-14905 since 12/18/2025. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/27/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299805 (Linux Distros Unpatched Vulnerability : CVE-2025-14905), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (299805) and CERT Bund (WID-SEC-2026-0494). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

• Red Hat Enterprise Linux

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Name

• 389-ds-base

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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