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Red Hat Product Errata RHSA-2021:4038 - Security Advisory
Issued:
2021-11-01
Updated:
2021-11-01

RHSA-2021:4038 - 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 7.2 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 7.2 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 7.2

SRPM
binutils-2.23.52.0.1-55.el7_2.4.src.rpm SHA-256: cd17c72a776936072fb1ee611002be4240755e42112575851b17b7f8231741c9
x86_64
binutils-2.23.52.0.1-55.el7_2.4.x86_64.rpm SHA-256: 67e9bb9a66fbcb032bdf5156a9b0053a361b728be6cdd2444312aa4b2d180f84
binutils-debuginfo-2.23.52.0.1-55.el7_2.4.i686.rpm SHA-256: 1ff3c2f268537b2f469067cc8f243ee3acf196d11d5c5998ae3c955338f205e8
binutils-debuginfo-2.23.52.0.1-55.el7_2.4.x86_64.rpm SHA-256: 263faabe9aa3e0a4f1977391d55017e508dc132397c67e9974fdae515d66d653
binutils-devel-2.23.52.0.1-55.el7_2.4.i686.rpm SHA-256: c4b4e794ba4a925d4e20a6d32b363b6be0ac1e2168618243f1116dfec0b3f499
binutils-devel-2.23.52.0.1-55.el7_2.4.x86_64.rpm SHA-256: cd7389e7fbbbd0df4154c90f32655e08eebcc23b045e1b16764cba1df265a282

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

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