Code execution via oversized M3U playlist
Published Aug 21, 2025 · Updated May 15, 2026
Stack-based buffer overflow in Steinberg myMP3 Player 3.0.0.67 and earlier allows attackers to execute code via a crafted M3U file. The playlist parser copies oversized input into a fixed stack buffer, permitting direct return-address overwrite at byte 1024 or SEH overwrite at byte 1040. A user must open the malicious playlist, after which attacker-supplied code runs in the application user's context.
Summary
What happened
Stack-based buffer overflow in Steinberg myMP3 Player 3.0.0.67 and earlier allows attackers to execute code via a crafted M3U file. The playlist parser copies oversized input into a fixed stack buffer, permitting direct return-address overwrite at byte 1024 or SEH overwrite at byte 1040. A user must open the malicious playlist, after which attacker-supplied code runs in the application user's context.
The record
- CVE
- CVE-2010-20123
- Published
- Aug 21, 2025
- Updated
- May 15, 2026
- Vendor
- Steinberg Media Technologies GmbH
- Product
- myMP3 Player
- Classifications
- CWE-121, CAPEC-100, T1204.002, T1203
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 21, 2025CVE publishedPublication date reported by the CVE source.
- May 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=3.0.0.67
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Steinberg MyMP3Player 3.0 Buffer Overflow Metasploit Moduleweaponized · validated
- myMP3-Player 3.0 .m3u Local Buffer Overflow SEHfunctional · demonstrated
- myMP3-Player 3.0 Local Buffer Overflowfunctional · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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