THREATPORT/VULNERABILITY/CVE-2009-0040
MEDIUM SEVERITY

CVE-2009-0040

Libpng vulnerability

CVSS
6.8
EPSS
4.8%
EPSS pct
91th
Exploited
No known
The PNG reference library (aka libpng) before 1.0.43, and 1.2.x before 1.2.35, as used in pngcrush and other applications, allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file that triggers a free of an uninitialized pointer in (1) the png_read_png function, (2) pCAL chunk handling, or (3) setup of 16-bit gamma tables.
Affected vendor
Libpng
Affected product
Libpng
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness type (CWE)
  • CWE-824 — Access of Uninitialized Pointer
Published
2009-02-22

Risk analysis

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

Its EPSS score of 4.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2009-0040

  • Confirm whether Libpng Libpng is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2009-0040.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2009-0040

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2009-0040 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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