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Red Hat: RHSA-2021-0223-01 Important Heap Overflow in Sudo

red hat
Calendar Grey January 26, 2021
Dist Redhat Esm H88
Important security patch for Red Hat Enterprise Linux 7.6 released to mitigate serious buffer overflow risk in sudo.
An update for sudo is now available for Red Hat Enterprise Linux 7.6 Extended Update Support

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

Summary

The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root.
Security Fix(es):
* sudo: Heap buffer overflow in argument parsing (CVE-2021-3156)
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.

Topics%20covered

Topics Covered

security advisory update buffer overflow red hat Red Hat Enterprise Linux important sudo heap overflow linux update

References

https://access.redhat.com/security/cve/CVE-2021-3156 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/RHSB-2021-002

Package List

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6):
Source: sudo-1.8.23-3.el7_6.2.src.rpm
x86_64: sudo-1.8.23-3.el7_6.2.x86_64.rpm sudo-debuginfo-1.8.23-3.el7_6.2.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6):
x86_64: sudo-debuginfo-1.8.23-3.el7_6.2.i686.rpm sudo-debuginfo-1.8.23-3.el7_6.2.x86_64.rpm sudo-devel-1.8.23-3.el7_6.2.i686.rpm sudo-devel-1.8.23-3.el7_6.2.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 7.6):
Source: sudo-1.8.23-3.el7_6.2.src.rpm
ppc64: sudo-1.8.23-3.el7_6.2.ppc64.rpm sudo-debuginfo-1.8.23-3.el7_6.2.ppc64.rpm
ppc64le: sudo-1.8.23-3.el7_6.2.ppc64le.rpm sudo-debuginfo-1.8.23-3.el7_6.2.ppc64le.rpm
s390x: sudo-1.8.23-3.el7_6.2.s390x.rpm sudo-debuginfo-1.8.23-3.el7_6.2.s390x.rpm
x86_64: sudo-1.8.23-3.el7_6.2.x86_64.rpm sudo-debuginfo-1.8.23-3.el7_6.2.x86_64.rpm
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):
Source: sudo-1.8.23-3.el7_6.2.src.rpm
aarch64: sudo-1.8.23-3.el7_6.2.aarch64.rpm sudo-debuginfo-1.8.23-3.el7_6.2.aarch64.rpm
ppc64le: sudo-1.8.23-3.el7_6.2.ppc64le.rpm sudo-debuginfo-1.8.23-3.el7_6.2.ppc64le.rpm
s390x: sudo-1.8.23-3.el7_6.2.s390x.rpm sudo-debuginfo-1.8.23-3.el7_6.2.s390x.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 7.6):
ppc64: sudo-debuginfo-1.8.23-3.el7_6.2.ppc.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0223-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0223
Issue date: 2021-01-26

Topic

An update for sudo is now available for Red Hat Enterprise Linux 7.6Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update buffer overflow red hat Red Hat Enterprise Linux important sudo heap overflow linux update

Relevant Releases Architectures

Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.6) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.6) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) - aarch64, ppc64le, s390x

Bugs Fixed

1917684 - CVE-2021-3156 sudo: Heap buffer overflow in argument parsing

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