K74013101 : Binutils vulnerability CVE-2021-42574

Security Advisory Description

An issue was discovered in the Bidirectional Algorithm in the Unicode Specification through 14.0. It permits the visual reordering of characters via control sequences, which can be used to craft source code that renders different logic than the logical ordering of tokens ingested by compilers and interpreters. Adversaries can leverage this to encode source code for compilers accepting Unicode such that targeted vulnerabilities are introduced invisibly to human reviewers. (CVE-2021-42574)

Impact

An attacker with the ability to affect source code may exploit this vulnerability to cause Trojan horse attacks that are invisible to human reviewers.