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RealplayerApplication · Realnetworks

CVE-2010-4377

HIGH · 9.3 CVSS v2.0 Published 2010-12-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.5, Mac RealPlayer 11.0 through 12.0.0.1444, and Linux RealPlayer 11.0.2.1744 allows remote attackers to execute arbitrary code by specifying many subbands in cook audio codec information in a Real Audio file.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

Heap-based buffer overflow in RealPlayer's cook audio codec allows remote code execution via specially crafted Real Audio files with excessive subbands in the codec information.

MitigationUpdate affected RealPlayer installations to patched versions (RealPlayer 11.1.1 or later, or SP 1.1.6+, or Mac 12.0.0.1625+, or Linux 11.0.2.1745+) that address this vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
RealplayerApplication
Affected:= 11.0= 11.0.1= 11.0.2= 11.0.3= 11.0.4= 11.0.5= 11.1= 12.0.0.1444= 11.0.2.1744
Realplayer SpApplication
Affected:= 1.0.0= 1.0.1= 1.0.2= 1.0.5= 1.1= 1.1.1= 1.1.2= 1.1.3= 1.1.4= 1.1.5

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
M
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify RealPlayer product and version
    Locate the installed RealPlayer or RealPlayer SP application and determine its exact version number from the application properties or About dialog
    Affected if The installed version matches any of: RealPlayer 11.0, 11.0.1, 11.0.2, 11.0.3, 11.0.4, 11.0.5, 11.1, 12.0.0.1444, 11.0.2.1744 OR RealPlayer SP 1.0.0, 1.0.1, 1.0.2, 1.0.5, 1.1, 1.1.1, 1.1.2, 1.1.3, 1.1.4, 1.1.5
  2. Confirm Real Audio file format support is active
    Verify that the cook audio codec component for handling Real Audio (.ra) files is present and enabled in the RealPlayer installation
    Affected if Real Audio file format support and the cook codec are present and functional in the installation
  3. Determine if untrusted Real Audio files can be processed
    Check whether the RealPlayer instance can open or process Real Audio files from external or untrusted sources
    Affected if The ability to open or play Real Audio files exists in the environment, allowing specially crafted files to be processed by the cook codec

You are affected if your installed RealPlayer or RealPlayer SP version matches any of the affected versions listed and the Real Audio / cook codec functionality is available to process files.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update affected RealPlayer installations to patched versions (RealPlayer 11.1.1 or later, or SP 1.1.6+, or Mac 12.0.0.1625+, or Linux 11.0.2.1745+) that address this vulnerability.

Recommended fix High confidence

RealPlayer 12.0.0.1444 or later / RealPlayer SP 1.1.6 or later

  1. 1. Uninstall the current version of RealPlayer or RealPlayer SP from the system
  2. 2. Download the latest version of RealPlayer from the official RealNetworks website (service.real.com)
  3. 3. Install the latest RealPlayer version (RealPlayer 12.0.0.1444 or later for Mac, or the current Windows/Linux version)
  4. 4. Verify the installed version matches or exceeds the fixed release
  5. 5. Test that media playback functionality works correctly with the new version
Caveat Legacy RealPlayer SP may have reduced feature set compared to older versions; some older codecs or file formats may no longer be supported in newer versions

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Realplayer Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2010-4377 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
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