Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2009-4247

28
FAUCET Score

CVE-2009-4247 describes a stack-based buffer overflow in RealNetworks RealPlayer and Helix Player products, affecting various versions across Windows, Mac, and Linux platforms. This vulnerability, stemming from an "array overflow" in the RTSP protocol, allows remote attackers to trigger a denial of service (application crash) or potentially execute arbitrary code. With a CVSS score of 9.3 (critical), it presents a high-risk scenario due to its network-based attack vector, medium attack complexity, and complete impact on confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
10.0CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:10.0:*:*:*:*:*:*:*
10.5CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:10.5:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
11.0.1CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:11.0.1:*:*:*:*:*:*:*
11.0.2CPE matchmatch criteria
cpe:2.3:a:realnetworks:realplayer:11.0.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.83%
Probability of exploitation in next 30 days
EPSS Percentile
93.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0683 is in the 69th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: HelixPlayer-1:1.0.6-1.el4_8.1
View patch

Vendor Advisories (1)

redhatCVE-2009-4247Critical

RealPlayer: RTSP client ASM RuleBook stack buffer overflow

Aug 28, 2009

References

lists.helixcommunity.org / pipermail/helix-client-dev/2009-August/008092.html
lists.helixcommunity.org / pipermail/protocol-cvs/2009-August/001943.html
bugzilla.redhat.com / show_bug.cgi
secunia.com / advisories/38218
Vendor Advisory
secunia.com / advisories/38450
Vendor Advisory
securitytracker.com / id
Patch
service.real.com / realplayer/security/01192010_player/en
PatchVendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/55802
helixcommunity.org / viewcvs/protocol/rtsp/rtspclnt.cpp
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10677
redhat.com / support/errata/RHSA-2010-0094.html
securityfocus.com / bid/37880
vupen.com / english/advisories/2010/0178
PatchVendor Advisory