CVE-2009-4243

critical

Published 2010-01-25 · Modified 2026-04-29

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CVSS v3

—

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.3

Description

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 Helix Player 10.x allow remote attackers to have an unspecified impact via a crafted media file that uses HTTP chunked transfer coding, related to an "overflow."

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

macOS Fixed 1 release

Version	Status	Fixed in
—	Not affected	—

Application impact

Vendor	Product	Versions
realnetworks	realplayer_enterprise
realnetworks	realplayer	`10.5`
realnetworks	realplayer	`11.0.1`
realnetworks	realplayer	`11.0.5`
realnetworks	helix_player	`11.0.0`
realnetworks	realplayer	`11.0.2`
realnetworks	helix_player	`11.0.1`
realnetworks	realplayer_sp	`1.0.0`
realnetworks	realplayer	`11.0.0`
realnetworks	realplayer	`11.0`
realnetworks	realplayer	`11.0.4`
realnetworks	realplayer	`10.0`
realnetworks	realplayer_sp	`1.0.1`
realnetworks	helix_player	`10.0`
realnetworks	realplayer	`11.0.3`
realnetworks	realplayer	`10.1`

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.