CVE-2017-9869
The II_step_one function in layer2.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products, allows remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted audio file.
Does this matter?
A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 4.1%. Treat it as high on anything reachable from the internet.
Description
The II_step_one function in layer2.c in mpglib, as used in libmpgdecoder.a in LAME 3.99.5 and other products, allows remote attackers to cause a denial of service (buffer over-read and application crash) via a crafted audio file.
- CVSS 3.0
- 5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- EPSS
- 4.06% probability · 91th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 26 June 2017
- CISA KEV
- Not listed
- Weakness
- CWE-125
- Affected
- lame project/lame
- Source
- cve@mitre.org
EPSS 4.1% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://www.securityfocus.com/bid/99272Third Party Advisory, VDB Entry
- https://blogs.gentoo.org/ago/2017/06/17/lame-global-buffer-overflow-in-ii_step_one-layer2-c/Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/42258/
- http://www.securityfocus.com/bid/99272Third Party Advisory, VDB Entry
- https://blogs.gentoo.org/ago/2017/06/17/lame-global-buffer-overflow-in-ii_step_one-layer2-c/Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/42258/
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.