CVE-2009-3382

Firefox vulnerability

CVSS

10.0

EPSS

10.8%

EPSS pct

95th

Exploited

No known

layout/base/nsCSSFrameConstructor.cpp in the browser engine in Mozilla Firefox 3.0.x before 3.0.15 does not properly handle first-letter frames, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unspecified vectors.

Affected vendor

Mozilla

Affected product

Firefox

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Published

2009-10-29

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 10.8% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 95% of all scored CVEs.

Check your external exposure to CVE-2009-3382

Confirm whether Mozilla Firefox is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2009-3382.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-3382

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-3382 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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