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CVE-2009-4257· NVD / CVE Program· CNA mitre

Heap-based buffer overflow in datatype/smil/common/smlpkt.cpp in smlrender.dll in RealNetworks RealPlayer 10, RealPlayer 10.5 6.0.12.1040 th

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 8.4% (FIRST EPSS); higher than 94.9% of all records.
  • Fixed version: HelixPlayer (Red Hat:enterprise_linux:4::as) 1:1.0.6-1.el4_8.1; HelixPlayer-debuginfo (Red Hat:enterprise_linux:4::as) 1:1.0.6-1.el4_8.1.

Add it to your regular patch cycle. Upgrade to HelixPlayer (Red Hat:enterprise_linux:4::as) 1:1.0.6-1.el4_8.1; HelixPlayer-debuginfo (Red Hat:enterprise_linux:4::as) 1:1.0.6-1.el4_8.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Heap-based buffer overflow in datatype/smil/common/smlpkt.cpp in smlrender.dll in 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 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.

CriticalCVSS 9.3 · v2.0—No exploit Fix available
Published
Jan 25, 2010
Updated
Jun 16, 2026
EPSS
8.5% · 95th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
37 / 40 · 9.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
3 / 30 · 8.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2009-4257

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
realnetworksrealplayer
realnetworksrealplayer enterprise
realnetworksrealplayer sp
realnetworkshelix player
microsoftwindows
applemac os x

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • realnetworks helix player10.0
  • realnetworks helix player11.0.0
  • realnetworks helix player11.0.1
  • realnetworks realplayer10.0
  • realnetworks realplayer10.1
  • realnetworks realplayer10.5
  • realnetworks realplayer11.0
  • realnetworks realplayer11.0.0
  • realnetworks realplayer11.0.1
  • realnetworks realplayer11.0.2
  • realnetworks realplayer11.0.3
  • realnetworks realplayer11.0.4
  • realnetworks realplayer11.0.5
  • realnetworks realplayer enterpriseall versions
  • realnetworks realplayer sp1.0.0
  • realnetworks realplayer sp1.0.1

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Red Hat:enterprise_linux:4::asHelixPlayerbefore 1:1.0.6-1.el4_8.11:1.0.6-1.el4_8.1
Red Hat:enterprise_linux:4::asHelixPlayer-debuginfobefore 1:1.0.6-1.el4_8.11:1.0.6-1.el4_8.1

Same product

realnetworks: all records

Other highest-scoring records for the same primary product.

  • CVE-2012-5691Buffer overflow in RealNetworks RealPlayer before 16.0.0.282 and RealPlayer SP 1.0 through 1.1.5 allows remote attackers to execute arbitrar
    53Plan
  • CVE-2008-1309The RealAudioObjects.RealAudio ActiveX control in rmoc3260.dll in RealNetworks RealPlayer Enterprise, RealPlayer 10, RealPlayer 10.5 before
    51Plan
  • CVE-2013-7260Multiple stack-based buffer overflows in RealNetworks RealPlayer before 17.0.4.61 on Windows, and Mac RealPlayer before 12.0.1.1738, allow r
    50Plan
  • CVE-2007-5601Stack-based buffer overflow in the Database Component in MPAMedia.dll in RealNetworks RealPlayer 10.5 and 11 beta, and earlier versions incl
    50Plan
  • CVE-2010-3747An ActiveX control in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.4, and RealPlayer Enterprise 2.1.2 does not p
    47Plan
  • CVE-2011-2950Heap-based buffer overflow in qcpfformat.dll in RealNetworks RealPlayer 11.0 through 11.1 and 14.0.0 through 14.0.5 and RealPlayer SP 1.0 th
    46Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:HelixPlayer1:1.0.6-1.el4_8.1 · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:HelixPlayer-debuginfo1:1.0.6-1.el4_8.1 · Red Hat:enterprise_linux:4::asPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    C · data can be read
    Integrity
    C · data or configuration can be modified
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    C
    Integrity impact
    C
    Availability impact
    C

    Weakness class (CWE)

    CWE-119 · Improper Restriction of Operations within the Bounds of a Memory Buffer

    CVSS vector

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

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    ATT&CK techniques

    —

    Change log

    1. Fix✗ → ✓

    For records you follow, these changes also arrive as notifications. →

    References

    Show all references (13 more)

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records