Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.1, Mac RealPlayer 11.0 through 11.1,…

published 2010-12-14 15 y ago modified 2026-06-16 4 mo ago also EUVD-2010-4345

cvss: 9.3; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 6.3%; EPSS 6.3% chance of exploitation in 30 days, percentile 93%
public exploits: 0; none known

Heap-based buffer overflow in RealNetworks RealPlayer 11.0 through 11.1, RealPlayer SP 1.0 through 1.1.1, Mac RealPlayer 11.0 through 11.1, and Linux RealPlayer 11.0.2.1744 allows remote attackers to execute arbitrary code via a large Screen Width value in the Screen Descriptor header of a GIF87a file in an RTSP stream.

Patch / fix

distros 1

HelixPlayer RHEL 4 1:1.0.6-1.el4_8.1

red hat advisories RHSA-2010:0094

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-4376 updated 2025-11-21 cvss 6.8

HelixPlayer multiple flaws (CVE-2010-2997, CVE-2010-4375, CVE-2010-4378, CVE-2010-4379, CVE-2010-4382, CVE-2010-4383, CVE-2010-4385, CVE-2010-4386, CVE-2010-4392, CVE-2010-4376)

Red Hat Enterprise Linux AS version 4 HelixPlayer 1.0.6-1.el4_8.1 Red Hat Enterprise Linux Desktop version 4 HelixPlayer 1.0.6-1.el4_8.1 Red Hat Enterprise Linux ES version 4 HelixPlayer 1.0.6-1.el4_8.1 Red Hat Enterprise Linux WS version 4 HelixPlayer 1.0.6-1.el4_8.1
fixed: vendor fix RHSA-2010:0094

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

6.29% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	9.3	AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness

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

References

service.real.com /realplayer/security/12102010_player/en/
vendor-advisory
securitytracker.com /id?1024861
vdb-entry
zerodayinitiative.com /advisories/ZDI-10-271
securityfocus.com /bid/45411
vdb-entry

Sources

CVE List CVE-2010-4376
NVD CVE-2010-4376

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary