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             AUSCERT External Security Bulletin Redistribution

                               ESB-2023.5851
     [RHSA-2023:5603] Important: kernel-rt security and bug fix update
                              11 October 2023

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           kernel-rt
Publisher:         Red Hat
Operating System:  Red Hat
Resolution:        Patch/Upgrade
CVE Names:         CVE-2023-35788 CVE-2023-35001 CVE-2023-31248
                   CVE-2023-28327 CVE-2023-4128 CVE-2023-3161
                   CVE-2023-1998 CVE-2023-1206 

Original Bulletin: 
   https://access.redhat.com/errata/RHSA-2023:5603

Comment: CVSS (Max):  7.8 CVE-2023-4128 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: Red Hat
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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=====================================================================
                Red Hat Security Advisory

Synopsis:          Important: kernel-rt security and bug fix update
Advisory ID:       RHSA-2023:5603
Product:           Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)
Advisory URL:      https://access.redhat.com/errata/RHSA-2023:5603
Issue date:        2023-10-10
CVE Names:         CVE-2023-1206 CVE-2023-1998 CVE-2023-3161 CVE-2023-4128
                   CVE-2023-28327 CVE-2023-31248 CVE-2023-35001 CVE-2023-35788
=====================================================================

1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of
Important. A Common Vulnerability Scoring System (CVSS) base score, which gives
a detailed severity rating, is available for each vulnerability from the CVE
link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0) - x86_64 
Red Hat Enterprise Linux Real Time EUS (v.9.0) - x86_64 

3. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-
tuning for systems with extremely high determinism requirements.

Security Fix(es):

* kernel: net/sched: Use-after-free vulnerabilities in the net/sched
classifiers: cls_fw, cls_u32 and cls_route (CVE-2023-4128)

* kernel: nf_tables: use-after-free in nft_chain_lookup_byid() (CVE-2023-31248)

* kernel: nf_tables: stack-out-of-bounds-read in nft_byteorder_eval()
(CVE-2023-35001)

* kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()
(CVE-2023-35788)

* kernel: hash collisions in the IPv6 connection lookup table (CVE-2023-1206)

* kernel: Spectre v2 SMT mitigations problem (CVE-2023-1998)

* kernel: fbcon: shift-out-of-bounds in fbcon_set_font() (CVE-2023-3161)

* kernel: denial of service problem in net/unix/diag.c (CVE-2023-28327)

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.

Bug Fix(es):

* kernel-rt: update RT source tree to the latest RHEL-9.0.z12 Batch (BZ#2232645)

4. 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

The system must be rebooted for this update to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

2175903 - CVE-2023-1206 - hash collisions in the IPv6 connection lookup table 
2187257 - CVE-2023-1998 - Spectre v2 SMT mitigations problem 
2213485 - CVE-2023-3161 - shift-out-of-bounds in fbcon_set_font() 
2225511 - CVE-2023-4128 - cls_fw, cls_u32 and cls_route 
2177382 - CVE-2023-28327 - denial of service problem in net/unix/diag.c 
2220893 - CVE-2023-31248 - use-after-free in nft_chain_lookup_byid() 
2220892 - CVE-2023-35001 - stack-out-of-bounds-read in nft_byteorder_eval() 
2215768 - CVE-2023-35788 - out-of-bounds write in fl_set_geneve_opt() 

6. Package List:

Red Hat Enterprise Linux Real Time for NFV EUS (v.9.0)

Source:
kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.src.rpm

x86_64:
kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-kvm-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-kvm-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-modules-extra-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm

Red Hat Enterprise Linux Real Time EUS (v.9.0)

Source:
kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.src.rpm

x86_64:
kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-core-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debug-modules-extra-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debuginfo-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-devel-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-modules-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm
kernel-rt-modules-extra-0:5.14.0-70.75.1.rt21.146.el9_0.x86_64.rpm

7. References:

https://www.cve.org/CVERecord?id=CVE-2023-1206
https://www.cve.org/CVERecord?id=CVE-2023-1998
https://www.cve.org/CVERecord?id=CVE-2023-3161
https://www.cve.org/CVERecord?id=CVE-2023-4128
https://www.cve.org/CVERecord?id=CVE-2023-28327
https://www.cve.org/CVERecord?id=CVE-2023-31248
https://www.cve.org/CVERecord?id=CVE-2023-35001
https://www.cve.org/CVERecord?id=CVE-2023-35788
https://access.redhat.com/security/updates/classification/#important

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