Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2022.4912
linux security update
4 October 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Linux kernel
Publisher: Debian
Operating System: Debian GNU/Linux
Resolution: Patch/Upgrade
CVE Names: CVE-2022-40307 CVE-2022-39842 CVE-2022-39188
CVE-2022-36946 CVE-2022-36879 CVE-2022-33744
CVE-2022-33742 CVE-2022-33741 CVE-2022-33740
CVE-2022-26373 CVE-2022-26365 CVE-2022-3028
CVE-2022-2663 CVE-2022-2588 CVE-2022-2586
CVE-2022-2318 CVE-2022-2153 CVE-2022-1679
CVE-2022-1462 CVE-2021-33656 CVE-2021-33655
CVE-2021-4159
Original Bulletin:
https://www.debian.org/lts/security/2022/dla-3131
Comment: CVSS (Max): 7.8* CVE-2022-2588 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD, [Red Hat], SUSE
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
* Not all CVSS available when published
- --------------------------BEGIN INCLUDED TEXT--------------------
- -------------------------------------------------------------------------
Debian LTS Advisory DLA-3131-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Ben Hutchings
October 01, 2022 https://wiki.debian.org/LTS
- -------------------------------------------------------------------------
Package : linux
Version : 4.19.260-1
CVE ID : CVE-2021-4159 CVE-2021-33655 CVE-2021-33656 CVE-2022-1462
CVE-2022-1679 CVE-2022-2153 CVE-2022-2318 CVE-2022-2586
CVE-2022-2588 CVE-2022-2663 CVE-2022-3028 CVE-2022-26365
CVE-2022-26373 CVE-2022-33740 CVE-2022-33741 CVE-2022-33742
CVE-2022-33744 CVE-2022-36879 CVE-2022-36946 CVE-2022-39188
CVE-2022-39842 CVE-2022-40307
Debian Bug : 1018752
Several vulnerabilities have been discovered in the Linux kernel that
may lead to privilege escalation, denial of service or information
leaks.
CVE-2021-4159
A flaw was found in the eBPF verifier which could lead to an
out-of-bounds read. If unprivileged use of eBPF is enabled, this
could leak sensitive information. This was already disabled by
default, which would fully mitigate the vulnerability.
CVE-2021-33655
A user with access to a framebuffer console device could cause a
memory out-of-bounds write via the FBIOPUT_VSCREENINFO ioctl.
CVE-2021-33656
A user with access to a framebuffer console device could cause a
memory out-of-bounds write via some font setting ioctls. These
obsolete ioctls have been removed.
CVE-2022-1462
Yi Zhi Gou reported a race condition in the pty (pseudo-terminal)
subsystem that can lead to a slab out-of-bounds write. A local
user could exploit this to cause a denial of service (crash or
memory corruption) or possibly for privilege escalation.
CVE-2022-1679
The syzbot tool found a race condition in the ath9k_htc driver
which can lead to a use-after-free. This might be exploitable to
cause a denial service (crash or memory corruption) or possibly
for privilege escalation.
CVE-2022-2153
"kangel" reported a flaw in the KVM implementation for x86
processors which could lead to a null pointer dereference. A local
user permitted to access /dev/kvm could exploit this to cause a
denial of service (crash).
CVE-2022-2318
A use-after-free in the Amateur Radio X.25 PLP (Rose) support may
result in denial of service.
CVE-2022-2586
A use-after-free in the Netfilter subsystem may result in local
privilege escalation for a user with the CAP_NET_ADMIN capability
in any user or network namespace.
CVE-2022-2588
Zhenpeng Lin discovered a use-after-free flaw in the cls_route
filter implementation which may result in local privilege
escalation for a user with the CAP_NET_ADMIN capability in any
user or network namespace.
CVE-2022-2663
David Leadbeater reported flaws in the nf_conntrack_irc
connection-tracking protocol module. When this module is enabled
on a firewall, an external user on the same IRC network as an
internal user could exploit its lax parsing to open arbitrary TCP
ports in the firewall, to reveal their public IP address, or to
block their IRC connection at the firewall.
CVE-2022-3028
Abhishek Shah reported a race condition in the AF_KEY subsystem,
which could lead to an out-of-bounds write or read. A local user
could exploit this to cause a denial of service (crash or memory
corruption), to obtain sensitive information, or possibly for
privilege escalation.
CVE-2022-26365, CVE-2022-33740, CVE-2022-33741, CVE-2022-33742
Roger Pau Monne discovered that Xen block and network PV device
frontends don't zero out memory regions before sharing them with
the backend, which may result in information disclosure.
Additionally it was discovered that the granularity of the grant
table doesn't permit sharing less than a 4k page, which may also
result in information disclosure.
CVE-2022-26373
It was discovered that on certain processors with Intel's Enhanced
Indirect Branch Restricted Speculation (eIBRS) capabilities there
are exceptions to the documented properties in some situations,
which may result in information disclosure.
Intel's explanation of the issue can be found at
https://www.intel.com/content/www/us/en/developer/articles/technical/
software-security-guidance/advisory-guidance/post-barrier-return-stack-
buffer-predictions.html
CVE-2022-33744
Oleksandr Tyshchenko discovered that ARM Xen guests can cause a
denial of service to the Dom0 via paravirtual devices.
CVE-2022-36879
A flaw was discovered in xfrm_expand_policies in the xfrm
subsystem which can cause a reference count to be dropped twice.
CVE-2022-36946
Domingo Dirutigliano and Nicola Guerrera reported a memory
corruption flaw in the Netfilter subsystem which may result in
denial of service.
CVE-2022-39188
Jann Horn reported a race condition in the kernel's handling of
unmapping of certain memory ranges. When a driver created a
memory mapping with the VM_PFNMAP flag, which many GPU drivers do,
the memory mapping could be removed and freed before it was
flushed from the CPU TLBs. This could result in a page use-after-
free. A local user with access to such a device could exploit
this to cause a denial of service (crash or memory corruption) or
possibly for privilege escalation.
CVE-2022-39842
An integer overflow was discovered in the pxa3xx-gcu video driver
which could lead to a heap out-of-bounds write.
This driver is not enabled in Debian's official kernel
configurations.
CVE-2022-40307
A race condition was discovered in the EFI capsule-loader driver,
which could lead to use-after-free. A local user permitted to
access this device (/dev/efi_capsule_loader) could exploit this to
cause a denial of service (crash or memory corruption) or possibly
for privilege escalation. However, this device is normally only
accessible by the root user.
For Debian 10 buster, these problems have been fixed in version
4.19.260-1.
We recommend that you upgrade your linux packages.
For the detailed security status of linux please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/linux
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
- -----BEGIN PGP SIGNATURE-----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=/gD5
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: https://auscert.org.au/gpg-key/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=FmPg
-----END PGP SIGNATURE-----