Date: Thu, 10 Dec 2015 09:23:04 -0500 From: Glenn Randers-Pehrson <glennrp@...il.com> To: oss-security@...ts.openwall.com Subject: Re: CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c) The bug was introduced in libpng-0.90, was fixed in libpng-1.6.0, and will be fixed in libpng-1.0.66, 1.2.56, 1.4.19, and 1.5.26. Glenn Randers-Pehrson libpng custodian On Thu, Dec 10, 2015 at 9:04 AM, xiaoqixue_1 <xiaoqixue_1@....com> wrote: > > > there is a underflow read in png_check_keyword in pngwutil.c in > libpng-1.2.54, which is found by XiaoQixue and ChenYu. > > if the data of "key" is only ' ' (0x20), it will read a byte before the > buffer in line 1288. > > it also impacts libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 . > > the details as follows: > https://sourceforge.net/p/libpng/bugs/244/
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