HOMEVULNERABILITIESCVE-2017-9869
MEDIUMPOC

CVE-2017-9869

CWE-125Published: June 25, 2017· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-9869 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

A proof-of-concept (PoC) exploit exists for CVE-2017-9869. While not yet confirmed in active campaigns, the availability of PoC code increases exploitation risk substantially.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected Vendors & Products

lame_project1 product(s)
lame
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

POC AVAILABLEProof-of-concept code exists
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.securityfocus.com/bid/99272
ADVISORYhttps://blogs.gentoo.org/ago/2017/06/17/lame-global-buffer-overflow-in-ii_step_one-layer2-c/
ADVISORYhttp://www.securityfocus.com/bid/99272
ADVISORYhttps://blogs.gentoo.org/ago/2017/06/17/lame-global-buffer-overflow-in-ii_step_one-layer2-c/

All References (6)

→
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/

Quick Facts

CVE IDCVE-2017-9869
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-125
CISA KEVNo
ExploitPOC
Affected1 vendor(s)
PublishedJun 25, 2017

Related CVEs (CWE-125)

CVE-2021-21777
10.0
CVE-2021-41556
10.0
CVE-2013-0767
10.0
CVE-2017-14451
10.0
CVE-2009-2523
10.0
CVE-2026-34987
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-9869 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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