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Red Hat Security Advisory 2021-4594-02

Red Hat Security Advisory 2021-4594-02
Posted Nov 10, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4594-02 - The binutils packages provide a collection of binary utilities for the manipulation of object code in various object file formats. It includes the ar, as, gprof, ld, nm, objcopy, objdump, ranlib, readelf, size, strings, strip, and addr2line utilities.

tags | advisory
systems | linux, redhat
advisories | CVE-2021-42574
SHA-256 | 184ab5eaf8e6f1d050dbec977a418bf99400fc42dc842e7769c86c530677dec2

Red Hat Security Advisory 2021-4594-02

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

Synopsis: Moderate: gcc-toolset-11-binutils security update
Advisory ID: RHSA-2021:4594-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:4594
Issue date: 2021-11-10
CVE Names: CVE-2021-42574
====================================================================
1. Summary:

An update for gcc-toolset-11-binutils 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 binutils packages provide a collection of binary utilities for the
manipulation of object code in various object file formats. It includes the
ar, as, gprof, ld, nm, objcopy, objdump, ranlib, readelf, size, strings,
strip, and addr2line utilities.

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 binutils in order to facilitate
detection of BiDi Unicode characters:

Tools which display names or strings (readelf, strings, nm, objdump) have a
new command line option --unicode / -U which controls how Unicode
characters are handled.

Using "--unicode├×fault" will treat them as normal for the tool. This is
the default behaviour when --unicode option is not used.
Using "--unicode=locale" will display them according to the current locale.
Using "--unicode=hex" will display them as hex byte values.
Using "--unicode=escape" will display them as Unicode escape sequences.
Using "--unicode=highlight" will display them as Unicode escape sequences
highlighted in red, if supported by the output device.

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-binutils-2.36.1-1.el8_5.1.src.rpm

aarch64:
gcc-toolset-11-binutils-2.36.1-1.el8_5.1.aarch64.rpm
gcc-toolset-11-binutils-debuginfo-2.36.1-1.el8_5.1.aarch64.rpm
gcc-toolset-11-binutils-devel-2.36.1-1.el8_5.1.aarch64.rpm

ppc64le:
gcc-toolset-11-binutils-2.36.1-1.el8_5.1.ppc64le.rpm
gcc-toolset-11-binutils-debuginfo-2.36.1-1.el8_5.1.ppc64le.rpm
gcc-toolset-11-binutils-devel-2.36.1-1.el8_5.1.ppc64le.rpm

s390x:
gcc-toolset-11-binutils-2.36.1-1.el8_5.1.s390x.rpm
gcc-toolset-11-binutils-debuginfo-2.36.1-1.el8_5.1.s390x.rpm
gcc-toolset-11-binutils-devel-2.36.1-1.el8_5.1.s390x.rpm

x86_64:
gcc-toolset-11-binutils-2.36.1-1.el8_5.1.x86_64.rpm
gcc-toolset-11-binutils-debuginfo-2.36.1-1.el8_5.1.i686.rpm
gcc-toolset-11-binutils-debuginfo-2.36.1-1.el8_5.1.x86_64.rpm
gcc-toolset-11-binutils-devel-2.36.1-1.el8_5.1.i686.rpm
gcc-toolset-11-binutils-devel-2.36.1-1.el8_5.1.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 <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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