CVE-2025-57155
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-20

Last updated on: 2026-02-13

Assigner: MITRE

Description
NULL pointer dereference in the daap_reply_groups function in src/httpd_daap.c in owntone-server through commit 5e6f19a (newer commit after version 28.2) allows remote attackers to cause a Denial of Service.
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Meta Information
Published
2026-01-20
Last Modified
2026-02-13
Generated
2026-06-16
AI Q&A
2026-01-20
EPSS Evaluated
2026-06-15
NVD
CVE-2025-57155
EUVD
EUVD-2026-3326
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
owntone owntone_server From 28.2 (inc)
Helpful Resources
Exploitability
CWE
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KEV
KEV Icon
CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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Executive Summary

This vulnerability is a null pointer dereference in the daap_reply_groups function in the Owntone server. It happens when the 'group-type' parameter is missing from an HTTP request query. The code originally called strcmp on this parameter without checking if it was null, which could cause the server to crash. The fix adds a null check before calling strcmp, preventing the crash when handling DAAP requests without the 'group-type' parameter. [1]

Impact Analysis

This vulnerability allows remote attackers to cause a Denial of Service (DoS) by crashing the Owntone server when it processes specially crafted DAAP requests missing the 'group-type' parameter. This can disrupt service availability.

Detection Guidance

This vulnerability can be detected by monitoring for crashes or Denial of Service symptoms in the Owntone server when handling DAAP requests, especially those missing the "group-type" parameter. Since the issue arises from a null pointer dereference in the daap_reply_groups function when processing such requests, you can attempt to reproduce the issue by sending DAAP HTTP requests without the "group-type" parameter and observe if the server crashes. Specific commands to test this could include using curl to send crafted HTTP requests, for example: curl 'http://<server-ip>:<port>/daap?someparam=value' (omitting the "group-type" parameter). If the server crashes or restarts, the vulnerability is present. [1]

Mitigation Strategies

The immediate mitigation step is to update the Owntone server to a version that includes the fix for this vulnerability, which adds a null check before calling strcmp on the "group-type" parameter. Applying the patch that modifies the condition to check if the parameter is non-null prevents the null pointer dereference and thus the Denial of Service. If updating is not immediately possible, consider implementing network-level protections to block malformed DAAP requests missing the "group-type" parameter or restrict access to the DAAP service until the patch can be applied. [1]

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