Heap-buffer-overflow in msyylex in mapserver

mapserver Updated 02 Oct 2025

Summary

12/10/2022

Disclosed on

HIGH

Severity

Yes i

Fix available

High

Severity

Not published

CVSS Score

OSV-2022-1041: Heap-buffer-overflow in msyylex. Affects mapserver versions >= 3b0aa0d2757512fdaa72c6856ce4cf58ff57f8b4, < b062947e3122a7f3dfc5812a230ede71b5bc7664. Fixed in b062947e3122a7f3dfc5812a230ede71b5bc7664. How to fix ↓

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Background

MapServer is an open-source platform for publishing spatial data and interactive mapping applications on the web. It provides a wide range of functionality for creating and serving maps, including support for various data formats, rendering styles, and spatial analysis. However, a vulnerability has been discovered in the msyylex component of MapServer, which can lead to a heap-buffer-overflow issue.

Vulnerability Detail

The vulnerability in msyylex can be triggered by a heap-buffer-overflow write operation. This can potentially allow an attacker to overwrite adjacent memory locations, leading to a crash or potential code execution. The vulnerability was reported through the OSS-Fuzz project, and more details can be found in the associated bug report (https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=52305). The affected versions of MapServer are those introduced after commit 3b0aa0d2757512fdaa72c6856ce4cf58ff57f8b4 and before commit b062947e3122a7f3dfc5812a230ede71b5bc7664.

How To Fix

Minimum fixed version

b062947e3122a7f3dfc5812a230ede71b5bc7664

This is the first release that contains the fix.

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Workaround

There is currently no known workaround for this vulnerability. It is advised to update to a fixed version of MapServer as soon as possible.

Conclusion

In conclusion, a heap-buffer-overflow vulnerability has been discovered in the msyylex component of MapServer. This vulnerability can potentially be exploited to crash the application or execute arbitrary code. It is crucial to update to a fixed version of MapServer to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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