THREATPORT/VULNERABILITY/CVE-2011-2501
MEDIUM SEVERITY

CVE-2011-2501

Libpng vulnerability

CVSS
6.5
EPSS
3.5%
EPSS pct
88th
Exploited
No known
The png_format_buffer function in pngerror.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 allows remote attackers to cause a denial of service (application crash) via a crafted PNG image that triggers an out-of-bounds read during the copying of error-message data. NOTE: this vulnerability exists because of a CVE-2004-0421 regression. NOTE: this is called an off-by-one error by some sources.
Affected vendor
Libpng
Affected product
Libpng
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness type (CWE)
Published
2011-07-17

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2011-2501

  • Confirm whether Libpng Libpng is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2011-2501.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-2501

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-2501 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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