CVE-2017-9869

MEDIUM

LAME 3.99.5 - Denial of Service via Crafted Audio File

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2017-9869. PoCs published by Agostino Sarubbo.

AI-analyzed exploit summary The exploit demonstrates a global buffer overflow in LAME MP3 encoder (version 3.99.5) via a crafted MP3 file, leading to a crash during decoding. The issue is triggered in the `II_step_one` function in `layer2.c` due to an out-of-bounds read.

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.

Exploits (1)

exploitdb WORKING POC VERIFIED
by Agostino Sarubbo · textdoslinux
https://www.exploit-db.com/exploits/42258

The exploit demonstrates a global buffer overflow in LAME MP3 encoder (version 3.99.5) via a crafted MP3 file, leading to a crash during decoding. The issue is triggered in the `II_step_one` function in `layer2.c` due to an out-of-bounds read.

Classification
Working Poc 90%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: LAME MP3 Encoder 3.99.5
No auth needed
Prerequisites: A crafted MP3 file to trigger the buffer overflow
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (3)

Core 3
Core References
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/99272
Exploit, Third Party Advisory exploit x_refsource_exploit-db
https://www.exploit-db.com/exploits/42258/

Scores

CVSS v3 5.5
EPSS 0.0406
EPSS Percentile 89.3%
Attack Vector LOCAL
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Details

CWE
CWE-125
Status published
Products (1)
lame_project/lame 3.99.5
Published Jun 25, 2017
Tracked Since Feb 18, 2026