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Red Hat 8.2: RHSA-2021-0763 Important: kpatch-patch Escalation of Privilege

red hat
Calendar Grey March 9, 2021
Dist Redhat Esm H88
New release for kpatch designed for Red Hat Enterprise Linux 8.2 introduces critical security enhancements.
An update for kpatch-patch is now available for Red Hat Enterprise Linux 8.2 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: bad kfree in auditfilter.c may lead to escalation of privilege (CVE-2020-0444)
* kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c (CVE-2020-25211)
* kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free (CVE-2020-29661)
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 buffer overflow red hat security fix kernel patch Red Hat Enterprise Linux important kpatch-patch escalation of privilege

References

https://access.redhat.com/security/cve/CVE-2020-0444 https://access.redhat.com/security/cve/CVE-2020-25211 https://access.redhat.com/security/cve/CVE-2020-29661 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):
Source: kpatch-patch-4_18_0-193-1-10.el8.src.rpm kpatch-patch-4_18_0-193_13_2-1-5.el8_2.src.rpm kpatch-patch-4_18_0-193_14_3-1-5.el8_2.src.rpm kpatch-patch-4_18_0-193_19_1-1-5.el8_2.src.rpm kpatch-patch-4_18_0-193_1_2-1-8.el8_2.src.rpm kpatch-patch-4_18_0-193_28_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_29_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_37_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_40_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_41_1-1-3.el8_2.src.rpm kpatch-patch-4_18_0-193_6_3-1-7.el8_2.src.rpm
ppc64le: kpatch-patch-4_18_0-193-1-10.el8.ppc64le.rpm kpatch-patch-4_18_0-193-debuginfo-1-10.el8.ppc64le.rpm kpatch-patch-4_18_0-193-debugsource-1-10.el8.ppc64le.rpm kpatch-patch-4_18_0-193_13_2-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_13_2-debuginfo-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_13_2-debugsource-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_14_3-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_14_3-debuginfo-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_14_3-debugsource-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-debuginfo-1-5.el8_2.ppc64le.rpm kpatch-patch-4_18_0-193_19_1-debugsource-1-5.el8_2.ppc64le.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:0763-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0763
Issue date: 2021-03-09

Topic

An update for kpatch-patch is now available for Red Hat Enterprise Linux8.2 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 buffer overflow red hat security fix kernel patch Red Hat Enterprise Linux important kpatch-patch escalation of privilege

Relevant Releases Architectures

Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - ppc64le, x86_64

Bugs Fixed

1877571 - CVE-2020-25211 kernel: Local buffer overflow in ctnetlink_parse_tuple_filter in net/netfilter/nf_conntrack_netlink.c

1906525 - CVE-2020-29661 kernel: locking issue in drivers/tty/tty_jobctrl.c can lead to an use-after-free

1920474 - CVE-2020-0444 kernel: bad kfree in auditfilter.c may lead to escalation of privilege

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