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Fencer Intel
high 7.5

CVE-2010-4577 json

The CSSParser::parseFontFaceSrc function in WebCore/css/CSSParser.cpp in WebKit, as used in Google Chrome before 8.0.552.224, Chrome OS bef…

published 2010-12-22 15 y ago modified 2026-06-16 4 mo ago also EUVD-2010-4543

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

The CSSParser::parseFontFaceSrc function in WebCore/css/CSSParser.cpp in WebKit, as used in Google Chrome before 8.0.552.224, Chrome OS before 8.0.552.343, webkitgtk before 1.2.6, and other products does not properly parse Cascading Style Sheets (CSS) token sequences, which allows remote attackers to cause a denial of service (out-of-bounds read) via a crafted local font, related to "Type Confusion."

Patch / fix

  • google chrome 8.0.552.224
  • webkitgtk webkitgtk 1.2.6
  • google chrome_os 8.0.552.343
  • webkitgtk RHEL 6 1.2.6-2.el6_0

red hat advisories RHSA-2011:0177

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-2010-4577 updated cvss 3.7

webkit: CSS Font Face Parsing Type Confusion Vulnerability

  • Red Hat Enterprise Linux Desktop (v. 6) webkitgtk 1.2.6-2.el6_0 Red Hat Enterprise Linux Desktop Optional (v. 6) webkitgtk 1.2.6-2.el6_0 Red Hat Enterprise Linux HPC Node Optional (v. 6) webkitgtk 1.2.6-2.el6_0 Red Hat Enterprise Linux Server (v. 6) webkitgtk 1.2.6-2.el6_0 Red Hat Enterprise Linux Server Optional (v. 6) webkitgtk 1.2.6-2.el6_0 Red Hat Enterprise Linux Workstation (v. 6) webkitgtk 1.2.6-2.el6_0
    +1 more products
    Red Hat Enterprise Linux Workstation Optional (v. 6) webkitgtk 1.2.6-2.el6_0
    fixed: vendor fix RHSA-2011:0177

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

2.21% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • code.google.com http://code.google.com/p/chromium/issues/detail?id=63866 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-843 Access of Resource Using Incompatible Type
Technology feeds

References

Sources

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.