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CVE Record

CVE-2018-5200: KMPlayer Heap Overflow Vulnerability

KMPlayer 4.2.2.15 and earlier have a Heap Based Buffer Overflow Vulnerability. It could be exploited with a crafted FLV format file. The problem is that more frame data is copied to heap memory than the size specified in the frame header. This results in a memory corruption and remote code execution.

HighCVSS 8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

KMPlayer 4.2.2.15 and earlier can be crashed or potentially hijacked when a user opens a specially crafted FLV video file. Successful exploitation is described as remote code execution, so the main business risk is compromise of user workstations that handle untrusted media.

Executive priority

Treat this as a high-priority endpoint hygiene issue where KMPlayer is present. Urgency is highest for teams handling external media, because exploitation requires user interaction but may lead to code execution.

Technical view

The CVE describes a heap-based buffer overflow in FLV frame handling: KMPlayer copies more frame data into heap memory than the frame header size allows. The published CVSS 3.0 score is 8.0, with user interaction required and high confidentiality, integrity, and availability impact.

Likely exposure

Exposure is most likely on Windows endpoints or shared media-analysis systems running KMPlayer 4.2.2.15 or earlier, especially where users open FLV files from email, messaging, downloads, or external media.

Exploitation context

The sources describe exploitation through a crafted FLV file and remote code execution. They do not show CISA KEV listing or cited evidence of active exploitation in the provided bundle.

Researcher notes

Evidence is limited to the CVE record and linked advisory metadata. No CWE is assigned in the bundle, and no patch version is named. Avoid assuming exploit availability beyond crafted FLV-triggered memory corruption.

Mitigation direction

  • Inventory endpoints for KMPlayer and confirm installed versions.
  • Upgrade or remove KMPlayer where vendor guidance supports remediation.
  • Restrict opening untrusted FLV files until remediation is confirmed.
  • Use endpoint controls to limit risky media-player execution paths.
  • Check the Korean KISA/Boho advisory and vendor channels for official fixes.

Validation and detection

  • Confirm whether KMPlayer version is 4.2.2.15 or earlier.
  • Review software inventory for unmanaged or legacy KMPlayer installs.
  • Check endpoint telemetry for KMPlayer opening externally sourced FLV files.
  • Verify updated or removed installations after remediation.
  • Document any business workflow that still requires FLV handling.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2018-5200 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8CVSS 3.0HighCVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H2.15.9Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

8High
CVSS 3.0 vector shape for CVE-2018-5200Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Pandora.tvKMPlayerKMPlayerListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.