CVE Vulnerabilities

CVE-2023-4575

Use After Free

Published: Sep 11, 2023 | Modified: Oct 21, 2024
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM

When creating a callback over IPC for showing the File Picker window, multiple of the same callbacks could have been created at a time and eventually all simultaneously destroyed as soon as one of the callbacks finished. This could have led to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.

Weakness

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

Affected Software

Name Vendor Start Version End Version
Firefox Mozilla * 117.0 (excluding)
Firefox Mozilla 115.0 (including) 115.2 (excluding)
Firefox_esr Mozilla * 102.15 (excluding)
Thunderbird Mozilla * 115.2 (excluding)
Red Hat Enterprise Linux 7 RedHat thunderbird-0:102.15.0-1.el7_9 *
Red Hat Enterprise Linux 7 RedHat firefox-0:102.15.0-1.el7_9 *
Red Hat Enterprise Linux 8 RedHat firefox-0:102.15.0-1.el8_8 *
Red Hat Enterprise Linux 8 RedHat thunderbird-0:102.15.0-1.el8_8 *
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions RedHat thunderbird-0:102.15.0-1.el8_1 *
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions RedHat firefox-0:102.15.0-1.el8_1 *
Red Hat Enterprise Linux 8.2 Advanced Update Support RedHat thunderbird-0:102.15.0-1.el8_2 *
Red Hat Enterprise Linux 8.2 Advanced Update Support RedHat firefox-0:102.15.0-1.el8_2 *
Red Hat Enterprise Linux 8.2 Telecommunications Update Service RedHat thunderbird-0:102.15.0-1.el8_2 *
Red Hat Enterprise Linux 8.2 Telecommunications Update Service RedHat firefox-0:102.15.0-1.el8_2 *
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions RedHat thunderbird-0:102.15.0-1.el8_2 *
Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions RedHat firefox-0:102.15.0-1.el8_2 *
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support RedHat thunderbird-0:102.15.0-1.el8_4 *
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support RedHat firefox-0:102.15.0-1.el8_4 *
Red Hat Enterprise Linux 8.4 Telecommunications Update Service RedHat thunderbird-0:102.15.0-1.el8_4 *
Red Hat Enterprise Linux 8.4 Telecommunications Update Service RedHat firefox-0:102.15.0-1.el8_4 *
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions RedHat thunderbird-0:102.15.0-1.el8_4 *
Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions RedHat firefox-0:102.15.0-1.el8_4 *
Red Hat Enterprise Linux 8.6 Extended Update Support RedHat firefox-0:102.15.0-1.el8_6 *
Red Hat Enterprise Linux 9 RedHat thunderbird-0:102.15.0-1.el9_2 *
Red Hat Enterprise Linux 9 RedHat firefox-0:102.15.0-1.el9_2 *
Red Hat Enterprise Linux 9.0 Extended Update Support RedHat thunderbird-0:102.15.0-1.el9_0 *
Red Hat Enterprise Linux 9.0 Extended Update Support RedHat firefox-0:102.15.0-1.el9_0 *
Firefox Ubuntu bionic *
Firefox Ubuntu focal *
Firefox Ubuntu lunar *
Firefox Ubuntu trusty *
Firefox Ubuntu xenial *
Mozjs102 Ubuntu devel *
Mozjs102 Ubuntu esm-apps/noble *
Mozjs102 Ubuntu jammy *
Mozjs102 Ubuntu lunar *
Mozjs102 Ubuntu mantic *
Mozjs102 Ubuntu noble *
Mozjs102 Ubuntu upstream *
Mozjs38 Ubuntu bionic *
Mozjs38 Ubuntu esm-apps/bionic *
Mozjs38 Ubuntu upstream *
Mozjs52 Ubuntu bionic *
Mozjs52 Ubuntu esm-apps/focal *
Mozjs52 Ubuntu esm-infra/bionic *
Mozjs52 Ubuntu focal *
Mozjs52 Ubuntu upstream *
Mozjs68 Ubuntu focal *
Mozjs68 Ubuntu upstream *
Mozjs78 Ubuntu esm-apps/jammy *
Mozjs78 Ubuntu jammy *
Mozjs78 Ubuntu lunar *
Mozjs78 Ubuntu upstream *
Mozjs91 Ubuntu jammy *
Mozjs91 Ubuntu upstream *
Thunderbird Ubuntu bionic *
Thunderbird Ubuntu devel *
Thunderbird Ubuntu focal *
Thunderbird Ubuntu jammy *
Thunderbird Ubuntu lunar *
Thunderbird Ubuntu mantic *
Thunderbird Ubuntu noble *
Thunderbird Ubuntu trusty *
Thunderbird Ubuntu xenial *

Extended Description

The use of previously-freed memory can have any number of adverse consequences, ranging from the corruption of valid data to the execution of arbitrary code, depending on the instantiation and timing of the flaw. The simplest way data corruption may occur involves the system’s reuse of the freed memory. Use-after-free errors have two common and sometimes overlapping causes:

In this scenario, the memory in question is allocated to another pointer validly at some point after it has been freed. The original pointer to the freed memory is used again and points to somewhere within the new allocation. As the data is changed, it corrupts the validly used memory; this induces undefined behavior in the process. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.

Potential Mitigations

References