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Red Hat 8.4 RHSA-2022:0772-01 Important Kpatch Update: Privilege Escalation

red hat
Calendar Grey March 8, 2022
Dist Redhat Esm H88
Crucial security enhancement for kpatch-patch addressing privilege elevation and Denial-of-Service flaws in Red Hat Enterprise Linux systems.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.4 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

This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel.
Security Fix(es):
* kernel: Use After Free in unix_gc() which could result in a local privilege escalation (CVE-2021-0920)
* kernel: use-after-free in RDMA listen() (CVE-2021-4028)
* kernel: possible privileges escalation due to missing TLB flush (CVE-2022-0330)
* kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS (CVE-2022-0435)
* kernel: failing usercopy allows for use-after-free exploitation (CVE-2022-22942)
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 Red Hat privilege escalation DoS important kernel kpatch

References

https://access.redhat.com/security/cve/CVE-2021-0920 https://access.redhat.com/security/cve/CVE-2021-4028 https://access.redhat.com/security/cve/CVE-2022-0330 https://access.redhat.com/security/cve/CVE-2022-0435 https://access.redhat.com/security/cve/CVE-2022-22942 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v.8.4):
Source: kpatch-patch-4_18_0-305-1-11.el8.src.rpm kpatch-patch-4_18_0-305_10_2-1-8.el8_4.src.rpm kpatch-patch-4_18_0-305_12_1-1-7.el8_4.src.rpm kpatch-patch-4_18_0-305_17_1-1-6.el8_4.src.rpm kpatch-patch-4_18_0-305_19_1-1-6.el8_4.src.rpm kpatch-patch-4_18_0-305_25_1-1-5.el8_4.src.rpm kpatch-patch-4_18_0-305_28_1-1-3.el8_4.src.rpm kpatch-patch-4_18_0-305_30_1-1-3.el8_4.src.rpm kpatch-patch-4_18_0-305_34_2-1-1.el8_4.src.rpm kpatch-patch-4_18_0-305_3_1-1-10.el8_4.src.rpm kpatch-patch-4_18_0-305_7_1-1-9.el8_4.src.rpm
ppc64le: kpatch-patch-4_18_0-305-1-11.el8.ppc64le.rpm kpatch-patch-4_18_0-305-debuginfo-1-11.el8.ppc64le.rpm kpatch-patch-4_18_0-305-debugsource-1-11.el8.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-1-8.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-debuginfo-1-8.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_10_2-debugsource-1-8.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-1-7.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-debuginfo-1-7.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_12_1-debugsource-1-7.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_17_1-1-6.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_17_1-debuginfo-1-6.el8_4.ppc64le.rpm kpatch-patch-4_18_0-305_17_1-debugsource-1-6.el8_4.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2022:0772-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2022:0772
Issue date: 2022-03-08

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux8.4 Extended 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 Red Hat privilege escalation DoS important kernel kpatch

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS EUS (v.8.4) - ppc64le, x86_64

Bugs Fixed

2027201 - CVE-2021-4028 kernel: use-after-free in RDMA listen()

2031930 - CVE-2021-0920 kernel: Use After Free in unix_gc() which could result in a local privilege escalation

2042404 - CVE-2022-0330 kernel: possible privileges escalation due to missing TLB flush

2044809 - CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation

2048738 - CVE-2022-0435 kernel: remote stack overflow via kernel panic on systems using TIPC may lead to DoS

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