UBUNTU-CVE-2022-2085

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 initdeviceprocs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, memxdevice is used and does not have an initdeviceprocs 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.

References

Affected packages

Ubuntu:22.04:LTS / ghostscript

Package

Name: ghostscript
Purl: pkg:deb/ubuntu/ghostscript@9.55.0~dfsg1-0ubuntu5.1?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

9.55.0~dfsg1-0ubuntu5.1

Affected versions

9.*

9.54.0~dfsg1-0ubuntu2

9.55.0~dfsg1-0ubuntu4

9.55.0~dfsg1-0ubuntu5

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "ghostscript",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "ghostscript-dbgsym",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "ghostscript-doc",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "ghostscript-x",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "ghostscript-x-dbgsym",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "libgs-dev",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "libgs9",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "libgs9-common",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        },
        {
            "binary_name": "libgs9-dbgsym",
            "binary_version": "9.55.0~dfsg1-0ubuntu5.1"
        }
    ],
    "availability": "No subscription required"
}