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Fencer Vulns
critical 9.3

CVE-2009-4242 json

Heap-based buffer overflow in the CGIFCodec::GetPacketBuffer function in datatype/image/gif/common/gifcodec.cpp in RealNetworks RealPlayer…

published 2010-01-25 16 y ago modified 2026-06-16 4 mo ago also EUVD-2009-4211

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
8.5%
EPSS 8.5% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

Heap-based buffer overflow in the CGIFCodec::GetPacketBuffer function in datatype/image/gif/common/gifcodec.cpp 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, 10.1, and 11.0; Linux RealPlayer 10; and Helix Player 10.x allows remote attackers to execute arbitrary code via a GIF file with crafted chunk sizes that trigger improper memory allocation.

Patch / fix

  • 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-2009-4242 updated cvss 6.8

RealPlayer: GIF file heap overflow

  • 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

8.45% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

Sources

Fencer Vulns 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.