A NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. When allocating a buffer device, it relies on an init_device_procs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, mem_x_device is used and does not have an init_device_procs defined. This flaw allows an attacker to parse a large number of bits (more than 64 bits per pixel), which triggers a NULL pointer dereference flaw, causing an application to crash.
We should backport the patch, 9.56.1 is completely useless.
GLSA request filed
The bug has been referenced in the following commit(s):
Author: GLSAMaker <firstname.lastname@example.org>
AuthorDate: 2022-11-22 03:53:57 +0000
Commit: John Helmert III <email@example.com>
CommitDate: 2022-11-22 03:59:40 +0000
[ GLSA 202211-11 ] GPL Ghostscript: Multiple Vulnerabilities
Signed-off-by: GLSAMaker <firstname.lastname@example.org>
Signed-off-by: John Helmert III <email@example.com>
glsa-202211-11.xml | 44 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
GLSA released, waiting for cleanup