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RHEL 7 : binutils (RHSA-2021:4035)
high Nessus Plugin ID 154830
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Synopsis
The remote Red Hat host is missing a security update for binutils.Description
The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:4035 advisory.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.
Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the RHEL binutils package based on the guidance in RHSA-2021:4035.See Also
http://www.nessus.org/u?d911dd8c
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/security/vulnerabilities/RHSB-2021-007
Plugin Details
Severity: High
ID: 154830
File Name: redhat-RHSA-2021-4035.nasl
Version: 1.11
Type: local
Agent: unix
Family: Red Hat Local Security Checks
Published: 11/2/2021
Updated: 11/7/2024
Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.3
Vendor
Vendor Severity: Moderate
CVSS v2
Risk Factor: Medium
Base Score: 5.1
Temporal Score: 4
Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-42574
CVSS v3
Risk Factor: High
Base Score: 8.3
Temporal Score: 7.5
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:redhat:rhel_tus:7.6, cpe:/o:redhat:rhel_aus:7.6, cpe:/o:redhat:rhel_e4s:7.6, p-cpe:/a:redhat:enterprise_linux:binutils, p-cpe:/a:redhat:enterprise_linux:binutils-devel
Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 11/1/2021
Vulnerability Publication Date: 11/1/2021
Reference Information
CVE: CVE-2021-42574