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Red Hat Enterprise Linux 8 RHSA-2021:1627-01 Moderate TrouSerS Bug Fix

red hat
Calendar Grey May 18, 2021
Dist Redhat Esm H88
SUSE unveils new enhancements for openSUSE Leap 15.3, tackling medium-level vulnerabilities and urgent patches, boosting overall stability.
An update for TrouSerS is now available for Red Hat Enterprise Linux 8

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

TrouSerS is an implementation of the Trusted Computing Group's Software Stack (TSS) specification. TrouSerS enables the user to write applications that make use of the Trusted Platform Module (TPM) hardware.
The following packages have been upgraded to a later upstream version: trousers (0.3.15). (BZ#1725782)
Security Fix(es):
* trousers: tss user still has read and write access to the /etc/tcsd.conf file if tcsd is started as root (CVE-2020-24331)
* trousers: tss user can be used to create or corrupt existing files, this could lead to DoS (CVE-2020-24332)
* trousers: fails to drop the root gid privilege when no longer needed (CVE-2020-24330)
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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.4 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix Red Hat Enterprise Linux DoS threat trusted computing Moderate Moderate severity TrouSerS trouser

References

https://access.redhat.com/security/cve/CVE-2020-24330 https://access.redhat.com/security/cve/CVE-2020-24331 https://access.redhat.com/security/cve/CVE-2020-24332 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.4_release_notes/

Package List

Red Hat Enterprise Linux BaseOS (v. 8):
Source: trousers-0.3.15-1.el8.src.rpm
aarch64: trousers-0.3.15-1.el8.aarch64.rpm trousers-debuginfo-0.3.15-1.el8.aarch64.rpm trousers-debugsource-0.3.15-1.el8.aarch64.rpm trousers-lib-0.3.15-1.el8.aarch64.rpm trousers-lib-debuginfo-0.3.15-1.el8.aarch64.rpm
ppc64le: trousers-0.3.15-1.el8.ppc64le.rpm trousers-debuginfo-0.3.15-1.el8.ppc64le.rpm trousers-debugsource-0.3.15-1.el8.ppc64le.rpm trousers-lib-0.3.15-1.el8.ppc64le.rpm trousers-lib-debuginfo-0.3.15-1.el8.ppc64le.rpm
s390x: trousers-0.3.15-1.el8.s390x.rpm trousers-debuginfo-0.3.15-1.el8.s390x.rpm trousers-debugsource-0.3.15-1.el8.s390x.rpm trousers-lib-0.3.15-1.el8.s390x.rpm trousers-lib-debuginfo-0.3.15-1.el8.s390x.rpm
x86_64: trousers-0.3.15-1.el8.x86_64.rpm trousers-debuginfo-0.3.15-1.el8.i686.rpm trousers-debuginfo-0.3.15-1.el8.x86_64.rpm trousers-debugsource-0.3.15-1.el8.i686.rpm trousers-debugsource-0.3.15-1.el8.x86_64.rpm trousers-lib-0.3.15-1.el8.i686.rpm trousers-lib-0.3.15-1.el8.x86_64.rpm trousers-lib-debuginfo-0.3.15-1.el8.i686.rpm trousers-lib-debuginfo-0.3.15-1.el8.x86_64.rpm
Red Hat CodeReady Linux Builder (v. 8):
aarch64: trousers-debuginfo-0.3.15-1.el8.aarch64.rpm trousers-debugsource-0.3.15-1.el8.aarch64.rpm trousers-devel-0.3.15-1.el8.aarch64.rpm

Read the Full Advisory


Advisory ID: RHSA-2021:1627-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1627
Issue date: 2021-05-18

Topic

An update for TrouSerS is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat bug fix Red Hat Enterprise Linux DoS threat trusted computing Moderate Moderate severity TrouSerS trouser

Relevant Releases Architectures

Red Hat CodeReady Linux Builder (v. 8) - aarch64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux BaseOS (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1870052 - CVE-2020-24332 trousers: tss user can be used to create or corrupt existing files, this could lead to DoS

1870054 - CVE-2020-24330 trousers: fails to drop the root gid privilege when no longer needed

1870056 - CVE-2020-24331 trousers: tss user still has read and write access to the /etc/tcsd.conf file if tcsd is started as root

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