oss-sec mailing list archives

Re: CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c)

From: Glenn Randers-Pehrson <glennrp () gmail com>
Date: Thu, 10 Dec 2015 09:23:04 -0500

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 () 163 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/

Current thread:

CVE request - Linux kernel - Fix handling of stored error in a negatively instantiated user key Wade Mealing (Dec 08)
- CVE request - Linux kernel - Fix handling of stored error in a negatively instantiated user key xiaoqixue_1 (Dec 09)
  - CVE request - a out of bound read bug is found in libdwarf xiaoqixue_1 (Dec 09)
    - Re: CVE request - a out of bound read bug is found in libdwarf cve-assign (Dec 09)
    - CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c) xiaoqixue_1 (Dec 10)
    - Re: CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c) Glenn Randers-Pehrson (Dec 10)
    - Re: CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c) Glenn Randers-Pehrson (Dec 17)
    - Re: CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c) cve-assign (Dec 11)
    - Re: Re: CVE request - read underflow in libpng 1.2.55, 1.0.65, 1.4.18, and 1.5.25 (pngwutil.c) Glenn Randers-Pehrson (Dec 11)
- Re: CVE request - Linux kernel - Fix handling of stored error in a negatively instantiated user key cve-assign (Dec 09)