CVE-2010-4577

Exp

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."

Published: 2010-12-22 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2010-4577 is rated High Exploit Risk (71/100): CVSS High severity, with medium exploitation likelihood (EPSS 2.21%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2010-4577

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2010-4577

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 4.27% 2.21% -2.06%
2 2025-03-30 9.01% 4.27% -4.75%
3 2025-03-29 — 9.01% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-4577

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2010-4577

OS Trackers for CVE-2010-4577

vendor priority summary link
gentoo high CVE-2010-4577: 1 GLSA(s) (201412-09), 25 atom(s) (app-admin/syslog-ng, app-misc/ca-certificates, …); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2010-4577
redhat medium — https://access.redhat.com/security/cve/CVE-2010-4577
ubuntu low CVE-2010-4577 low priority: Ubuntu including 2 source packages (chromium-browser, webkit), 12 status rows across 7 suites (dapper, hardy, karmic, lucid, maverick, natty, upstream): released 7, DNE 3, ignored 1, not-affected 1. https://ubuntu.com/security/CVE-2010-4577

Affected software / configurations for CVE-2010-4577

Vendor Product Version Raw CPE
google chrome < 8.0.552.224 cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
webkitgtk webkitgtk < 1.2.6 cpe:2.3:a:webkitgtk:webkitgtk:*:*:*:*:*:*:*:*
google chrome_os < 8.0.552.343 cpe:2.3:o:google:chrome_os:*:*:*:*:*:*:*:*
fedoraproject fedora 13 cpe:2.3:o:fedoraproject:fedora:13:*:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

References for CVE-2010-4577

URL Tags
http://code.google.com/p/chromium/issues/detail?id=63866 Exploit Issue Tracking Mailing List
http://googlechromereleases.blogspot.com/2010/12/stable-beta-channel-updates_13.html Release Notes
http://lists.fedoraproject.org/pipermail/package-announce/2011-January/052906.html Mailing List Third Party Advisory
http://secunia.com/advisories/42648 Broken Link Third Party Advisory
http://secunia.com/advisories/43086 Broken Link Third Party Advisory
http://trac.webkit.org/changeset/72685 Mailing List Patch
http://trac.webkit.org/changeset/72685/trunk/WebCore/css/CSSParser.cpp Mailing List Patch
http://www.debian.org/security/2011/dsa-2188 Mailing List Third Party Advisory
http://www.gentoo.org/security/en/glsa/glsa-201012-01.xml Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-0177.html Broken Link Third Party Advisory
http://www.securityfocus.com/bid/45722 Broken Link Third Party Advisory VDB Entry
http://www.vupen.com/english/advisories/2011/0216 Broken Link Third Party Advisory
https://bugs.webkit.org/show_bug.cgi?id=49883 Permissions Required
https://bugzilla.redhat.com/show_bug.cgi?id=667025 Issue Tracking Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A13953 Broken Link Third Party Advisory
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