CVE-2025-58447
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-09

Last updated on: 2025-09-17

Assigner: GitHub, Inc.

Description
rAthena is an open-source cross-platform massively multiplayer online role playing game (MMORPG) server. Versions prior to commit 2f5248b have a heap-based buffer overflow in the login server, remote attacker to overwrite adjacent session fields by sending a crafted `CA_SSO_LOGIN_REQ` with an oversized token length. This leads to immediate denial of service (crash) and it is possible to achieve remote code execution via heap corruption. Commit 2f5248b fixes the issue.
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Meta Information
Published
2025-09-09
Last Modified
2025-09-17
Generated
2026-06-16
AI Q&A
2025-09-10
EPSS Evaluated
2026-06-15
NVD
CVE-2025-58447
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
rathena rathena to 2025-09-06 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
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().
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Executive Summary

This vulnerability is a heap-based buffer overflow in the login server of rAthena, an open-source MMORPG server. A remote attacker can send a specially crafted login request with an oversized token length, causing the server to overwrite adjacent session fields in memory. This can lead to a crash (denial of service) or potentially allow the attacker to execute arbitrary code remotely via heap corruption.

Impact Analysis

The vulnerability can cause the rAthena server to crash, resulting in denial of service. More critically, it may allow a remote attacker to execute arbitrary code on the server, potentially compromising the server's integrity, confidentiality, and availability.

Mitigation Strategies

Update rAthena to include the fix from commit 2f5248b or later, as this commit addresses the heap-based buffer overflow vulnerability in the login server. Until the update is applied, consider restricting access to the login server to trusted networks to reduce exposure.

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