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Vulnerability record · CVE-2009-4247 · published 25 January 2010

CVE-2009-4247: Realnetworks realplayer memory buffer overflow vulnerability

RRealnetworks · Realplayer

Stack-based buffer overflow in protocol/rtsp/rtspclnt.cpp in RealNetworks RealPlayer 10; RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741; RealPlayer 11 11.0.x; RealPlayer SP 1.0.0 and 1.0.1; RealPlayer Enterprise; Mac RealPlayer 10, 10.1, 11.0, and 11.0.1; Linux RealPlayer 10, 11.0.0, and 11.0.1; and Helix Player 10.x, 11.0.0, and 11.0.1 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an ASM RuleBook with a large number of rules, related to an "array overflow."

9.3 CVSS 2.0 High EPSS 6.8% · top 6.2% CWE-119 · Memory buffer overflow
9.3CVSS 2.0 base score
6.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
26References
16 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in protocol/rtsp/rtspclnt.cpp in RealNetworks RealPlayer 10; RealPlayer 10.5 6.0.12.1040 through 6.0.12.1741; RealPlayer 11 11.0.x; RealPlayer SP 1.0.0 and 1.0.1; RealPlayer Enterprise; Mac RealPlayer 10, 10.1, 11.0, and 11.0.1; Linux RealPlayer 10, 11.0.0, and 11.0.1; and Helix Player 10.x, 11.0.0, and 11.0.1 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via an ASM RuleBook with a large number of rules, related to an "array overflow."

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.helixcommunity.org/pipermail/helix-client-dev/2009-August/008092.html
http://lists.helixcommunity.org/pipermail/protocol-cvs/2009-August/001943.html
http://secunia.com/advisories/38218 Vendor Advisory
http://secunia.com/advisories/38450 Vendor Advisory
http://securitytracker.com/id?1023489 Patch
http://service.real.com/realplayer/security/01192010_player/en/ PatchVendor Advisory
http://www.redhat.com/support/errata/RHSA-2010-0094.html
http://www.securityfocus.com/bid/37880
http://www.vupen.com/english/advisories/2010/0178 PatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=561338
https://exchange.xforce.ibmcloud.com/vulnerabilities/55802
https://helixcommunity.org/viewcvs/protocol/rtsp/rtspclnt.cpp?view=log#rev1.245
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10677
http://lists.helixcommunity.org/pipermail/helix-client-dev/2009-August/008092.html
http://lists.helixcommunity.org/pipermail/protocol-cvs/2009-August/001943.html
http://secunia.com/advisories/38218 Vendor Advisory
http://secunia.com/advisories/38450 Vendor Advisory
http://securitytracker.com/id?1023489 Patch
http://service.real.com/realplayer/security/01192010_player/en/ PatchVendor Advisory
http://www.redhat.com/support/errata/RHSA-2010-0094.html
http://www.securityfocus.com/bid/37880
http://www.vupen.com/english/advisories/2010/0178 PatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=561338
https://exchange.xforce.ibmcloud.com/vulnerabilities/55802
https://helixcommunity.org/viewcvs/protocol/rtsp/rtspclnt.cpp?view=log#rev1.245
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10677

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-4256Realnetworks realplayer code injection vulnerabilityThe RV30 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 does not initialize an unspecified index value, which a…EPSS 4.3%10.0CVE-2011-4246Realnetworks realplayer memory buffer overflow vulnerabilityThe AAC codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to execute arbitrary code or cau…EPSS 4.0%10.0CVE-2011-4249Realnetworks realplayer improper input validation vulnerabilityArray index error in the RV30 codec in RealNetworks RealPlayer before 15.0.0 allows remote attackers to execute arbitrary code via unspecified vector…EPSS 3.3%10.0CVE-2011-4250Realnetworks realplayer vulnerabilityUnspecified vulnerability in the ATRC codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to…EPSS 4.1%10.0CVE-2011-4253Realnetworks realplayer vulnerabilityUnspecified vulnerability in the RV20 codec in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to…EPSS 4.1%10.0CVE-2011-4254Realnetworks realplayer code injection vulnerabilityRealNetworks RealPlayer before 15.0.0 allows remote attackers to execute arbitrary code via a crafted RTSP SETUP request.EPSS 3.4%10.0CVE-2011-4255Realnetworks realplayer vulnerabilityUnspecified vulnerability in RealNetworks RealPlayer before 15.0.0 and Mac RealPlayer before 12.0.0.1703 allows remote attackers to execute arbitrary…EPSS 4.1%10.0CVE-2011-4244Realnetworks realplayer memory buffer overflow vulnerabilityHeap-based buffer overflow in the RealVideo renderer in RealNetworks RealPlayer before 15.0.0 allows remote attackers to execute arbitrary code via u…EPSS 3.4%

Source: NIST National Vulnerability Database (record CVE-2009-4247), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.