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Unrated severityNVD Advisory· Published Nov 24, 2011· Updated Apr 29, 2026

CVE-2011-4251

CVE-2011-4251

Description

A crafted sample size in a RealAudio file lets attackers execute arbitrary code on vulnerable RealPlayer versions before 15.0.0.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

A crafted sample size in a RealAudio file lets attackers execute arbitrary code on vulnerable RealPlayer versions before 15.0.0.

Vulnerability

A heap-based buffer overflow exists in RealNetworks RealPlayer before version 15.0.0. The flaw occurs when the player parses a specially crafted sample size field within a RealAudio file. No special configuration is required beyond opening the malicious file. All versions prior to 15.0.0 are affected [1].

Exploitation

An attacker can exploit this vulnerability by convincing a user to open a malicious RealAudio file (e.g., via email, web download, or streaming). No additional privileges or network position beyond user interaction are required. The crafted sample size triggers a memory corruption that can be leveraged for code execution [1].

Impact

Successful exploitation allows arbitrary code execution in the context of the current user. This can lead to full compromise of the affected system, including data theft, installation of malware, or further privilege escalation [1].

Mitigation

RealNetworks released RealPlayer 15.0.0 to address this vulnerability. Users should update to version 15.0.0 or later. No known workarounds exist [1]. The issue is not listed on CISA's Known Exploited Vulnerabilities catalog.

References
  1. Home to the video player and downloader, RealPlayer from RealNetworks

AI Insight generated on May 24, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

31
  • RealNetworks/Realplayer31 versions
    cpe:2.3:a:realnetworks:realplayer:*:*:*:*:*:*:*:*+ 30 more
    • cpe:2.3:a:realnetworks:realplayer:*:*:*:*:*:*:*:*range: <=14.0.7
    • cpe:2.3:a:realnetworks:realplayer:10.0:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:10.5:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.2.1744:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.2.2315:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.0.5:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.1:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11.1.3:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:11_build_6.0.14.748:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:12.0.0.1444:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:12.0.0.1548:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.0:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.1:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.1.609:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.1.633:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.2:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.3:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.4:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.5:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:14.0.6:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:4:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:5:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:6:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:7:*:*:*:*:*:*:*
    • cpe:2.3:a:realnetworks:realplayer:8:*:*:*:*:*:*:*
    • (no CPE)range: <15.0.0

Patches

0

No patches discovered yet.

Vulnerability mechanics

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References

1

News mentions

0

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