CVE-2008-3964

Libpng vulnerability

CVSS

4.3

EPSS

3.3%

EPSS pct

87th

Exploited

No known

Multiple off-by-one errors in libpng before 1.2.32beta01, and 1.4 before 1.4.0beta34, allow context-dependent attackers to cause a denial of service (crash) or have unspecified other impact via a PNG image with crafted zTXt chunks, related to (1) the png_push_read_zTXt function in pngread.c, and possibly related to (2) pngtest.c.

Affected vendor

Libpng

Affected product

Libpng

CVSS vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Weakness type (CWE)

CWE-193 — Off-by-one Error

Published

2008-09-11

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 availability.

Its EPSS score of 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2008-3964

Confirm whether Libpng Libpng is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2008-3964.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2008-3964

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2008-3964 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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