CVE Vulnerabilities

CVE-2022-20502

Use After Free

Published: Dec 13, 2022 | Modified: Nov 21, 2024
CVSS 3.x
5.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.x
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM

In GetResolvedMethod of entrypoint_utils-inl.h, there is a possible use after free due to a stale cache. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-222166527

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
Android Google 13.0 (including) 13.0 (including)
Android-platform-art Ubuntu bionic *
Android-platform-art Ubuntu devel *
Android-platform-art Ubuntu esm-apps/bionic *
Android-platform-art Ubuntu esm-apps/focal *
Android-platform-art Ubuntu esm-apps/jammy *
Android-platform-art Ubuntu esm-apps/noble *
Android-platform-art Ubuntu focal *
Android-platform-art Ubuntu jammy *
Android-platform-art Ubuntu kinetic *
Android-platform-art Ubuntu lunar *
Android-platform-art Ubuntu mantic *
Android-platform-art Ubuntu noble *
Android-platform-art Ubuntu oracular *
Android-platform-art Ubuntu trusty *
Android-platform-art Ubuntu xenial *
Android-platform-tools Ubuntu devel *
Android-platform-tools Ubuntu esm-apps/jammy *
Android-platform-tools Ubuntu esm-apps/noble *
Android-platform-tools Ubuntu jammy *
Android-platform-tools Ubuntu kinetic *
Android-platform-tools Ubuntu lunar *
Android-platform-tools Ubuntu mantic *
Android-platform-tools Ubuntu noble *
Android-platform-tools Ubuntu oracular *
Android-platform-tools Ubuntu trusty *
Android-platform-tools 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