A vulnerability has been discovered in libpng that allows for information disclosure.
|Package||media-libs/libpng on all architectures|
|Affected versions||< 1.2.37|
|Unaffected versions||>= 1.2.37|
libpng is the official PNG reference library used to read, write and manipulate PNG images.
Jeff Phillips discovered that libpng 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.
A remote attacker might entice a user to open a specially crafted PNG file, possibly resulting in the disclosure of sensitive memory portions.
There is no known workaround at this time.
All libpng users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/libpng-1.2.37"
June 27, 2009
June 27, 2009: 01