Product Errata

RLSA-2021:4586

Moderate: gcc-toolset-11-gcc security update

Topic

An update is available for gcc-toolset-11-gcc.

This update affects Rocky Linux 8.

A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list

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.

Issued: 11/10/2021

Type: Security

Severity: Moderate

Affected Product

  • Rocky Linux 8

References

  • No references