PatchSiren cyber security CVE debrief
CVE-2011-10023 MJM Software CVE debrief
A stack-based buffer overflow vulnerability exists in MJM QuickPlayer (also known as MJM Player) version 2010, triggered when a user opens a malicious .s3m music file. The flaw stems from improper bounds checking in the file parser, enabling memory corruption and potential arbitrary code execution. Exploitation requires user interaction to open a crafted file. The vulnerability was disclosed in 2011 with proof-of-concept exploitation techniques documented, including return-oriented programming (ROP) to bypass modern memory protections. The CVE record was published in August 2025 and last modified in May 2026, with NVD status currently marked as Deferred.
- Vendor
- MJM Software
- Product
- QuickPlayer
- CVSS
- HIGH 8.4
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2025-08-20
- Original CVE updated
- 2026-05-26
- Advisory published
- 2025-08-20
- Advisory updated
- 2026-05-26
Who should care
Organizations with legacy media playback requirements, security teams managing end-of-life software inventories, and incident responders investigating suspicious .s3m file activity. This vulnerability primarily affects Windows environments where MJM QuickPlayer 2010 remains installed.
Technical summary
The vulnerability is a classic stack-based buffer overflow (CWE-121) in the .s3m file parser of MJM QuickPlayer 2010. Insufficient bounds checking allows a crafted music file to overwrite stack memory. Successful exploitation yields arbitrary code execution under the context of the user. Historical exploitation research demonstrated ROP chains to circumvent DEP and ASLR, though this requires precise gadget availability in the target process. The attack vector is local with required user interaction (opening the malicious file), limiting widespread automated exploitation but maintaining significant risk for targeted attacks via social engineering.
Defensive priority
HIGH
Recommended defensive actions
- Remove or disable MJM QuickPlayer 2010 from all systems; no security patches are available for this end-of-life software
- Block .s3m file attachments at email gateways and web proxies to prevent initial access
- Implement application control policies to prevent execution of MJM QuickPlayer
- Train users to avoid opening unsolicited music files, particularly .s3m format
- Consider endpoint detection rules for suspicious child processes spawned by media players
- Review and restrict software installation permissions to prevent unauthorized media player deployment
Evidence notes
The vulnerability was originally disclosed in 2011 per archived Corelan advisory. CVE record published 2025-08-20; modified 2026-05-26. NVD status: Deferred. CVSS 4.0 vector indicates local attack vector with user interaction required.
Official resources
2011