RealNetworks RealPlayer up to 11.0.5 smlrender.dll memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in RealNetworks RealPlayer up to 11.0.5 (Multimedia Player Software). It has been rated as very critical. Affected by this issue is an unknown functionality in the library smlrender.dll. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Heap-based buffer overflow in datatype/smil/common/smlpkt.cpp in smlrender.dll in RealNetworks RealPlayer 10, RealPlayer 10.5 through, RealPlayer 11 11.0.0 through 11.0.4, RealPlayer Enterprise, Mac RealPlayer 10 and 10.1, Linux RealPlayer 10 and 11.0.0, and Helix Player 10.x and 11.0.0 allows remote attackers to execute arbitrary code via an SMIL file with crafted string lengths.

The weakness was presented 01/25/2010 by Peter Vreugdenhil (TippingPoint) with TippingPoint's Zero Day Initiative (Website). The advisory is shared for download at This vulnerability is handled as CVE-2009-4257 since 12/09/2009. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/31/2021). It is expected to see the exploit prices for this product decreasing in the near future.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 44428 (CentOS 4 : HelixPlayer (CESA-2010:0094)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 116821 (RealPlayer Multiple Vulnerabilities).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 5907.

The vulnerability is also documented in the databases at X-Force (55798) and Tenable (44428).







CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.4

VulDB Base Score: 10.0
VulDB Temp Score: 9.4
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

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Nessus ID: 44428
Nessus Name: CentOS 4 : HelixPlayer (CESA-2010:0094)
Nessus File: 🔍
Nessus Risk: 🔍
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OpenVAS ID: 880364
OpenVAS Name: CentOS Update for HelixPlayer CESA-2010:0094 centos4 i386
OpenVAS File: 🔍
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Threat Intelligenceinfo

Interest: 🔍
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Recommended: no mitigation known
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TippingPoint: 🔍


12/09/2009 🔍
01/20/2010 +42 days 🔍
01/20/2010 +0 days 🔍
01/20/2010 +0 days 🔍
01/21/2010 +1 days 🔍
01/25/2010 +4 days 🔍
01/25/2010 +0 days 🔍
02/15/2010 +21 days 🔍
03/18/2015 +1857 days 🔍
08/31/2021 +2358 days 🔍



Researcher: Peter Vreugdenhil (TippingPoint)
Organization: TippingPoint's Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-4257 (🔍)

X-Force: 55798
SecurityTracker: 1023489 - RealPlayer Buffer Overflows Let Remote Users Execute Arbitrary Code
Vulnerability Center: 24834 - Real Player Remote Arbitrary Code Execution via a SMIL File With Crafted String Lengths, Medium
SecurityFocus: 37880 - Multiple RealNetworks Products Multiple Remote Vulnerabilities
Secunia: 38218 - RealPlayer Multiple Vulnerabilities, Highly Critical
Vupen: ADV-2010-0178


Created: 03/18/2015 03:15 PM
Updated: 08/31/2021 04:51 PM
Changes: 03/18/2015 03:15 PM (69), 02/21/2017 08:02 AM (20), 08/31/2021 04:51 PM (2)
Complete: 🔍
Cache ID: 44:45B:40


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