Fedora 31 Security Advisory: gd Library Buffer Overflow and Free Error

The gd graphics library allows your code to quickly draw images

complete with lines, arcs, text, multiple colors, cut and paste from

other images, and flood fills, and to write out the result as a PNG or

JPEG file. This is particularly useful in Web applications, where PNG

and JPEG are two of the formats accepted for inline images by most

browsers. Note that gd is not a paint program.

fixed multiple security bugs

* Fri Nov 1 2019 odubaj@redhat.com - 2.2.5-10

- Fixed heap based buffer overflow in gd_color_match.c:gdImageColorMatch() in libgd as used in imagecolormatch()

- Resolves: RHBZ#1678104 (CVE-2019-6977)

- Fixed potential double-free in gdImage*Ptr()

- Resolves: RHBZ#1671391 (CVE-2019-6978)

[ 1 ] Bug #1672210 - CVE-2019-6977 gd: heap based buffer overflow in gd_color_match.c:gdImageColorMatch() in libgd as used in imagecolormatch() [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1672210

[ 2 ] Bug #1671391 - CVE-2019-6978 gd: double free in the gdImage*Ptr in gd_gif_out.c, gd_jpeg.c, and gd_wbmp.c [fedora-all]

https://bugzilla.redhat.com/show_bug.cgi?id=1671391

su -c 'dnf upgrade --advisory FEDORA-2019-7a06c0e6b4' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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