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Red Hat Product Errata RHSA-2021:4037 - Security Advisory
Issued:
2021-11-01
Updated:
2021-11-01

RHSA-2021:4037 - 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 7.3 Advanced Update Support.

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 7.3 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 7.3

SRPM
binutils-2.25.1-22.base.el7_3.3.src.rpm SHA-256: f50b0a2de6f7551714ca70950d003ed088456d2a70c8780e4ea15793a9710623
x86_64
binutils-2.25.1-22.base.el7_3.3.x86_64.rpm SHA-256: 811c7d386731b2f9d21bc3153c6479a69be77cca707f2c9e94cabd6af79e5fb3
binutils-debuginfo-2.25.1-22.base.el7_3.3.i686.rpm SHA-256: 96acec038e9fad843d342ae2599397c771a4085e60c133c6326466c3dbc20e52
binutils-debuginfo-2.25.1-22.base.el7_3.3.x86_64.rpm SHA-256: f100200219d09db271f31970d00ea591ad1862db1311821b8722c54be0347e9f
binutils-devel-2.25.1-22.base.el7_3.3.i686.rpm SHA-256: fe8cba083e8e24a75deb57195ed9c20c616f2730c4718af4e98398ba03c03911
binutils-devel-2.25.1-22.base.el7_3.3.x86_64.rpm SHA-256: fd3efd62439f933e39a745e8cc7f84276eaf3fe5432c75f34087644e35f0e756

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

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