CVE-2008-3964 Integer overflow in n/a
Off-by-one errors in libpng allow attackers to cause a denial of service via crafted PNG images with malicious zTXt chunks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2008-3964?
CVE-2008-3964 is a medium-severity vulnerability in Libpng Libpng, published on 10 Sep 2008. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-193
Which versions are affected by CVE-2008-3964?
It affects 1 product.
Products include Libpng Libpng.
How do I fix CVE-2008-3964?
Upgrade to a fixed version.
Is CVE-2008-3964 being exploited?
There is no known exploitation of CVE-2008-3964 in the wild and no public exploit code.
Other vulnerabilities in Libpng Libpng
- CVE-2017-12652 Denial of service in n/a
- CVE-2018-14550 Out-of-bounds write in libpng
- CVE-2026-25646 LIBPNG has a heap buffer overflow in png_set_quantize
- CVE-2026-33636 LIBPNG has ARM NEON Palette Expansion Out-of-Bounds Read on AArch64
- CVE-2026-33416 LIBPNG has use-after-free via pointer aliasing in `png_set_tRNS` and `png_set_PLTE`
Sources
Also known as GHSA-fj2p-r342-gx3m.