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Red Hat Product Errata RHSA-2021:4034 - Security Advisory
Issued:
2021-11-01
Updated:
2021-11-01

RHSA-2021:4034 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: binutils security update

Type/Severity

Security Advisory: Moderate

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for binutils is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions.

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.

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=default" 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.

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

Affected Products

  • Red Hat Enterprise Linux Server - AUS 7.7 x86_64
  • Red Hat Enterprise Linux Server - TUS 7.7 x86_64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7 x86_64

Fixes

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

CVEs

  • CVE-2021-42574

References

  • https://access.redhat.com/security/updates/classification/#moderate
  • https://access.redhat.com/security/vulnerabilities/RHSB-2021-007
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server - AUS 7.7

SRPM
binutils-2.27-41.base.el7_7.4.src.rpm SHA-256: b5c0ee9209f61b5db0632b8da980dabea73797303c269396c5961aafd6d7f6da
x86_64
binutils-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: 26c429d9657e13ec8159b630fee315c7c7bbc46f57c81ed2d8007a53d74d9de6
binutils-debuginfo-2.27-41.base.el7_7.4.i686.rpm SHA-256: 32214c79258fdfd100d4499f2d451b80d048e8c93ab483db1f83bd4b2fdc9662
binutils-debuginfo-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: 959fd4ba88bf48304ab7563cea418ea25fe52f874aab737a951625b1f3dcea70
binutils-devel-2.27-41.base.el7_7.4.i686.rpm SHA-256: 24cac963361b32b3b68cbb42dea61e3529aa7f7dae449aece3ff99fc9fbfed76
binutils-devel-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: f81442bad3d27ad054b18800c6e47e45715754f03a931f8934693995de00914f

Red Hat Enterprise Linux Server - TUS 7.7

SRPM
binutils-2.27-41.base.el7_7.4.src.rpm SHA-256: b5c0ee9209f61b5db0632b8da980dabea73797303c269396c5961aafd6d7f6da
x86_64
binutils-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: 26c429d9657e13ec8159b630fee315c7c7bbc46f57c81ed2d8007a53d74d9de6
binutils-debuginfo-2.27-41.base.el7_7.4.i686.rpm SHA-256: 32214c79258fdfd100d4499f2d451b80d048e8c93ab483db1f83bd4b2fdc9662
binutils-debuginfo-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: 959fd4ba88bf48304ab7563cea418ea25fe52f874aab737a951625b1f3dcea70
binutils-devel-2.27-41.base.el7_7.4.i686.rpm SHA-256: 24cac963361b32b3b68cbb42dea61e3529aa7f7dae449aece3ff99fc9fbfed76
binutils-devel-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: f81442bad3d27ad054b18800c6e47e45715754f03a931f8934693995de00914f

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 7.7

SRPM
binutils-2.27-41.base.el7_7.4.src.rpm SHA-256: b5c0ee9209f61b5db0632b8da980dabea73797303c269396c5961aafd6d7f6da
ppc64le
binutils-2.27-41.base.el7_7.4.ppc64le.rpm SHA-256: 3636d486168476d2125e4c2f01353a99b0aceb2dce14e514c76d53956862519c
binutils-debuginfo-2.27-41.base.el7_7.4.ppc64le.rpm SHA-256: df2d52a474be0bac5033adccbec6301933bfa7e6447a2f472bdad2d941d41e0e
binutils-devel-2.27-41.base.el7_7.4.ppc64le.rpm SHA-256: 9b68e719921fdf2659269131ad9d914a78474df4ee488dfe5164863c429e4102

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.7

SRPM
binutils-2.27-41.base.el7_7.4.src.rpm SHA-256: b5c0ee9209f61b5db0632b8da980dabea73797303c269396c5961aafd6d7f6da
x86_64
binutils-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: 26c429d9657e13ec8159b630fee315c7c7bbc46f57c81ed2d8007a53d74d9de6
binutils-debuginfo-2.27-41.base.el7_7.4.i686.rpm SHA-256: 32214c79258fdfd100d4499f2d451b80d048e8c93ab483db1f83bd4b2fdc9662
binutils-debuginfo-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: 959fd4ba88bf48304ab7563cea418ea25fe52f874aab737a951625b1f3dcea70
binutils-devel-2.27-41.base.el7_7.4.i686.rpm SHA-256: 24cac963361b32b3b68cbb42dea61e3529aa7f7dae449aece3ff99fc9fbfed76
binutils-devel-2.27-41.base.el7_7.4.x86_64.rpm SHA-256: f81442bad3d27ad054b18800c6e47e45715754f03a931f8934693995de00914f

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

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