HOMEVULNERABILITIESCVE-2009-4243
CRITICAL

CVE-2009-4243

CWE-119Published: January 25, 2010· Updated: Jun 16, 2026

9.3
CVSS v3.1

Official Description

RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10, and Helix Player 10.x allow remote attackers to have an unspecified impact via a crafted media file that uses HTTP chunked transfer coding, related to an "overflow."

NVD Source

Technical Analysis

CVE-2009-4243 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-119): Buffer overflow vulnerabilities can lead to arbitrary code execution or denial of service by corrupting adjacent memory.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected Vendors & Products

Apple1 product(s)
mac os x
Microsoft1 product(s)
windows
realnetworks4 product(s)
realplayerrealplayer enterpriserealplayer sphelix player
Source: NVD CPE · 18 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
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

PATCHhttp://securitytracker.com/id?1023489
PATCHhttp://service.real.com/realplayer/security/01192010_player/en/
PATCHhttp://www.vupen.com/english/advisories/2010/0178
PATCHhttp://securitytracker.com/id?1023489
PATCHhttp://service.real.com/realplayer/security/01192010_player/en/
PATCHhttp://www.vupen.com/english/advisories/2010/0178
ADVISORYhttp://secunia.com/advisories/38218
ADVISORYhttp://secunia.com/advisories/38218

All References (14)

→
http://osvdb.org/61967
→
http://secunia.com/advisories/38218Vendor Advisory
→
http://securitytracker.com/id?1023489Patch
→
http://service.real.com/realplayer/security/01192010_player/en/Patch · Vendor Advisory
→
http://www.securityfocus.com/bid/37880
→
http://www.vupen.com/english/advisories/2010/0178Patch · Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/55796
→
http://osvdb.org/61967
→
http://secunia.com/advisories/38218Vendor Advisory
→
http://securitytracker.com/id?1023489Patch
→
http://service.real.com/realplayer/security/01192010_player/en/Patch · Vendor Advisory
→
http://www.securityfocus.com/bid/37880
→
http://www.vupen.com/english/advisories/2010/0178Patch · Vendor Advisory
→
https://exchange.xforce.ibmcloud.com/vulnerabilities/55796

Quick Facts

CVE IDCVE-2009-4243
CVSS Score9.3 / 10
SeverityCRITICAL
WeaknessCWE-119
CISA KEVNo
Affected3 vendor(s)
PublishedJan 25, 2010

Related CVEs (CWE-119)

CVE-2022-4291
10.0
CVE-2015-5545
10.0
CVE-2018-19417
10.0
CVE-2020-11896
10.0
CVE-2013-4977
10.0
CVE-2015-5547
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2009-4243 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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