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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: gcc-toolset-11-gcc security update
Advisory ID:       RHSA-2021:4586-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4586
Issue date:        2021-11-10
CVE Names:         CVE-2021-42574 
=====================================================================

1. Summary:

An update for gcc-toolset-11-gcc is now available for Red Hat Enterprise
Linux 8.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

3. 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.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

2005819 - CVE-2021-42574 Developer environment: Unicode's bidirectional (BiDi) override characters can cause trojan source attacks

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
gcc-toolset-11-gcc-11.2.1-1.2.el8_5.src.rpm

aarch64:
gcc-toolset-11-gcc-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-c++-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-c++-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-gdb-plugin-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-gdb-plugin-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-gfortran-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-gfortran-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-plugin-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-gcc-plugin-devel-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libasan-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libatomic-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libgccjit-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libgccjit-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libgccjit-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libgccjit-docs-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libitm-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-liblsan-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libstdc++-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libstdc++-docs-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libtsan-devel-11.2.1-1.2.el8_5.aarch64.rpm
gcc-toolset-11-libubsan-devel-11.2.1-1.2.el8_5.aarch64.rpm
libasan6-11.2.1-1.2.el8_5.aarch64.rpm
libasan6-debuginfo-11.2.1-1.2.el8_5.aarch64.rpm

ppc64le:
gcc-toolset-11-gcc-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-c++-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-c++-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-gdb-plugin-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-gdb-plugin-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-gfortran-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-gfortran-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-plugin-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-gcc-plugin-devel-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libasan-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libatomic-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libgccjit-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libgccjit-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libgccjit-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libgccjit-docs-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libitm-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-liblsan-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libquadmath-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libstdc++-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libstdc++-docs-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libtsan-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-libubsan-devel-11.2.1-1.2.el8_5.ppc64le.rpm
gcc-toolset-11-offload-nvptx-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm
libasan6-11.2.1-1.2.el8_5.ppc64le.rpm
libasan6-debuginfo-11.2.1-1.2.el8_5.ppc64le.rpm

s390x:
gcc-toolset-11-gcc-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-c++-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-c++-debuginfo-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-debuginfo-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-gdb-plugin-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-gdb-plugin-debuginfo-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-gfortran-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-gfortran-debuginfo-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-plugin-devel-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-gcc-plugin-devel-debuginfo-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libasan-devel-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libatomic-devel-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libgccjit-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libgccjit-debuginfo-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libgccjit-devel-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libgccjit-docs-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libitm-devel-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libstdc++-devel-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libstdc++-docs-11.2.1-1.2.el8_5.s390x.rpm
gcc-toolset-11-libubsan-devel-11.2.1-1.2.el8_5.s390x.rpm
libasan6-11.2.1-1.2.el8_5.s390x.rpm
libasan6-debuginfo-11.2.1-1.2.el8_5.s390x.rpm

x86_64:
gcc-toolset-11-gcc-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-c++-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-c++-debuginfo-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-gcc-c++-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-debuginfo-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-gcc-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-gdb-plugin-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-gdb-plugin-debuginfo-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-gcc-gdb-plugin-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-gfortran-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-gfortran-debuginfo-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-gcc-gfortran-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-plugin-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-gcc-plugin-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-gcc-plugin-devel-debuginfo-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-gcc-plugin-devel-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libasan-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libasan-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libatomic-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libatomic-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libgccjit-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libgccjit-debuginfo-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libgccjit-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libgccjit-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libgccjit-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libgccjit-docs-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libitm-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libitm-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-liblsan-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libquadmath-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libquadmath-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libstdc++-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libstdc++-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libstdc++-docs-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libtsan-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-libubsan-devel-11.2.1-1.2.el8_5.i686.rpm
gcc-toolset-11-libubsan-devel-11.2.1-1.2.el8_5.x86_64.rpm
gcc-toolset-11-offload-nvptx-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm
libasan6-11.2.1-1.2.el8_5.i686.rpm
libasan6-11.2.1-1.2.el8_5.x86_64.rpm
libasan6-debuginfo-11.2.1-1.2.el8_5.i686.rpm
libasan6-debuginfo-11.2.1-1.2.el8_5.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2021-42574
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/RHSB-2021-007

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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