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.
The product dereferences a pointer that it expects to be valid but is NULL.
| Link | Tags |
|---|---|
| https://bugs.ghostscript.com/show_bug.cgi?id=704945 | issue tracking mailing list patch vendor advisory exploit |
| https://bugzilla.redhat.com/show_bug.cgi?id=2095261 | issue tracking third party advisory patch |
| http://git.ghostscript.com/?p=ghostpdl.git%3Bh=ae1061d948d88667bdf51d47d918c4684d0f67df | |
| https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ERSZX5LKDWAHZWJYBMP2E2UHOPUCDEGV/ | vendor advisory |
| https://security.gentoo.org/glsa/202211-11 | third party advisory vendor advisory |
| https://security.gentoo.org/glsa/202309-03 |