RedHat gcc CVE-2021-42574 Code Injection Vulnerability

Description

The gcc packages provide compilers for C, C++, Java, Fortran, Objective C, and Ada 95 GNU, as well as related support libraries. Security Fix(es): Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks (CVE-2021-42574) The following changes were introduced in gcc in order to facilitate detection of BiDi Unicode characters: This update implements a new warning option -Wbidirectional to warn about possibly dangerous bidirectional characters. There are three levels of warning supported by gcc:"-Wbidirectional=unpaired", which warns about improperly terminated BiDi contexts. (This is the default.)"-Wbidirectional=none", which turns the warning off."-Wbidirectional=any", which warns about any use of bidirectional characters. For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. SolutionFor details on how to apply this update, which includes the changes described in this advisory, refer to:https://access.redhat.com/articles/11258

Affected Applications

gcc

CVE References

Other References