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CVE-2020-9870

Status Candidate

Overview

A logic issue was addressed with improved validation. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8. An attacker with memory write capability may be able to bypass pointer authentication codes and run arbitrary code.

Related Files

PAC Bypass Due To Unprotected Function Pointer Imports
Posted Aug 19, 2020
Authored by saelo, Google Security Research

PAC aims to prevent an attacker with the ability to read and write memory from executing arbitrary code. It does that by cryptographically signing and validating code pointers (as well as some data pointers) at runtime. However, it seems that imports of function pointers from shared libraries in userspace are not properly protected by PAC, allowing an attacker to sign arbitrary pointers and thus bypass PAC.

tags | advisory, arbitrary
advisories | CVE-2020-9870
MD5 | 1d4d2c1d8f30ccfd1c36adfae489b2a3
Apple Security Advisory 2020-07-15-2
Posted Jul 17, 2020
Authored by Apple | Site apple.com

Apple Security Advisory 2020-07-15-2 - macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra are now available and address buffer overflow, code execution, denial of service, out of bounds read, and out of bounds write vulnerabilities.

tags | advisory, denial of service, overflow, vulnerability, code execution
systems | apple
advisories | CVE-2019-14899, CVE-2019-19906, CVE-2019-20807, CVE-2020-9799, CVE-2020-9864, CVE-2020-9865, CVE-2020-9866, CVE-2020-9870, CVE-2020-9878, CVE-2020-9884, CVE-2020-9885, CVE-2020-9888, CVE-2020-9889, CVE-2020-9890, CVE-2020-9891, CVE-2020-9913, CVE-2020-9918, CVE-2020-9934, CVE-2020-9936
MD5 | a61b35f8dbe9b3563ab08b9ba525a3ca
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