CVE-2009-2042 Information disclosure in n/a
Remote attackers can read sensitive memory by tricking users into opening specially crafted 1-bit interlaced PNG files with specific widths.
- 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-2009-2042?
CVE-2009-2042 is a medium-severity vulnerability in Libpng Libpng, published on 12 Jun 2009. 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
libpng before 1.2.37 does not properly parse 1-bit interlaced images with width values that are not divisible by 8, which causes libpng to include uninitialized bits in certain rows of a PNG file and might allow remote attackers to read portions of sensitive memory via "out-of-bounds pixels" in the file.
Weakness: CWE-200
Which versions are affected by CVE-2009-2042?
It affects 1 product.
Products include Libpng Libpng.
How do I fix CVE-2009-2042?
Upgrade to a fixed version.
Is CVE-2009-2042 being exploited?
There is no known exploitation of CVE-2009-2042 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-rh45-m734-j52q.