CVE-2024-29510

Artifex Ghostscript anterior a 10.03.1 permite la corrupción de la memoria y una omisión MÁS SEGURA de la sandbox mediante la inyección de cadena de formato con un dispositivo uniprint.

A flaw in Ghostscript has been identified where the uniprint device allows users to pass various string fragments as device options. These strings, particularly upWriteComponentCommands and upYMoveCommand, are treated as format strings for gp_fprintf and gs_snprintf. This lack of restriction permits arbitrary format strings with multiple specifiers, potentially leading to data leakage from the stack and memory corruption. In RHEL 9 or newer, an attacker could exploit this vulnerability to temporarily disable Ghostscript’s SAFER mode, which prevents Postscript code from executing commands or opening arbitrary files during the current invocation.

It was discovered that Ghostscript did not properly restrict eexec seeds to those specified by the Type 1 Font Format standard when SAFER mode is used. An attacker could use this issue to bypass SAFER restrictions and cause unspecified impact. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.10. Thomas Rinsma discovered that Ghostscript did not prevent changes to uniprint device argument strings after SAFER is activated, resulting in a format-string vulnerability. An attacker could possibly use this to execute arbitrary code.