[Ksplice][Ubuntu-20.04-Updates] New Ksplice updates for Ubuntu 20.04 Focal (USN-6896-1)

[Oracle Ksplice]

Synopsis: USN-6896-1 can now be patched using Ksplice
CVEs: CVE-2022-0001 CVE-2022-0002 CVE-2022-48627 CVE-2023-52620 CVE-2023-52880 CVE-2023-6270 CVE-2024-25739 CVE-2024-26586 CVE-2024-26642 CVE-2024-26643 CVE-2024-26816 CVE-2024-26828 CVE-2024-26851 CVE-2024-26852 CVE-2024-26855 CVE-2024-26857 CVE-2024-26863 CVE-2024-26882 CVE-2024-26889 CVE-2024-26898 CVE-2024-26901 CVE-2024-26923 CVE-2024-26973 CVE-2024-26993 CVE-2024-35823 CVE-2024-35897 CVE-2024-35900 CVE-2024-35910 CVE-2024-35950 CVE-2024-35973

Systems running Ubuntu 20.04 Focal can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-6896-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running Ubuntu 20.04
Focal install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2022-48627, CVE-2024-35823: Data corruption in virtual terminal driver.

Optimisation of a function call in virtual terminal driver can lead to
data corruption due to copying between overlapping buffers. A local
attacker can exploit this flaw to cause a denial-of-service, corrupt
data, or aid in other types of attacks.


* CVE-2023-52620, CVE-2024-26642, CVE-2024-26643: Privilege escalation in netfilter subsystem.

A logical error in the netfilter subsystem can cause a race between the
netfilter garbage collector and freeing of anonymous sets with timeouts
(wrongly allowed to create from userspace), leading to a use-after-free.
A local attacker can exploit this flaw to escalate privileges or
facilitate an attack.


* CVE-2023-52880: Privilege escalation in GSM 07.10 tty multiplexor.

An unprivileged user can attach to the line discipline of GSM 07.10 tty
multiplexor driver even though CAP_NET_ADMIN is needed to create a GSM
network. A local attacker can exploit this flaw to extract sensitive
information from kernel memory, execute arbitrary code, and eventually
escalate privileges or facilitate an attack.


* CVE-2023-6270, CVE-2024-26898: Use-after-free in ATA-over-Ethernet driver.

Due to incorrect handling of device refcount in the ATA-over-Ethernet
(AoE) driver, a race is possible between freeing of an AoE device and
access through associated socket buffers, leading to a use-after-free.
A local attacker can exploit this flaw to cause a denial-of-service or
execute arbitrary code.


* CVE-2024-25739: Denial-of-service in Unsorted block images (UBI).

Incorrect validation of logical eraseblock sizes in UBI support could lead to a
kernel crash. A local attacker could use this flaw to cause a denial-of-
service.


* CVE-2024-26586: Denial-of-service in Mellanox Technologies Spectrum driver.

A logic error in Mellanox Technologies Spectrum driver could lead
to a kernel stack corruption. A local attacker could use this to
cause a denial-of-service.


* CVE-2024-26816: Information leak in /sys/kernel/notes for x86 systems.

An unprivileged attacker can read /sys/kernel/notes which contains
relocations of Xen variables. As System.map file is also readable
by an unprivileged attacker, KASLR can be bypassed since the attacker
can find out the relative offsets and combine that with the Xen
relocation address to find the address of any kernel symbol, which
can facilitate an attack, like privilege escalation.


* CVE-2024-26828: Remote privilege escalation in SMB3 and CIFS driver.

An invalid check when using SMB3 and CIFS driver could lead to an
out-of-bounds memory access. A remote attacker could use this flaw to
escalate privileges.


* CVE-2024-26851: Denial-of-service in Network packet filtering framework.

A missing check when using Network packet filtering framework
(Netfilter) could lead to an out-of-bounds access. A local attacker
could use this flaw to cause a denial-of-service or facilitate an
attack.


* CVE-2024-26852: Privilege escalation when using IPV6 multipath routes.

A logic error when using IPV6 multipath routes could lead to a
use-after-free. A local attacker could use this flaw to escalate
privilege.


* CVE-2024-26855: Denial-of-service in Intel Ethernet Connection E800 Series driver.

A logic error in Intel Ethernet Connection E800 Series driver could lead
to a NULL pointer dereference. A local attacker can exploit this flaw to
cause a denial-of-service.


* CVE-2024-26857: Information leak in Generic Network Virtualization Encapsulation driver.

During reception of packets in GENEVE driver, uninitialised memory can
be accessed due to incorrect handling of headers of the socket buffer.
An attacker (local or remote) can exploit this flaw to access sensitive
information from the kernel memory or facilitate an attack.


* CVE-2024-26863: Information leak in HSR networking stack.

Missing check for the HSR tag after the Ethernet header in the
High-availability Seamless Redundancy networking stack can lead
to accessing uninitialised memory. An attacker (local or remote)
can exploit this flaw to extract sensitive information from the
kernel memory or facilitate an attack.


* CVE-2024-26882: Information leak in IP tunneling stack.

During reception of packets in IP tunneling stack, uninitialised memory
can be accessed due to incorrect handling of headers of the socket
buffer. An attacker (local or remote) can exploit this flaw to access
sensitive information from the kernel memory or facilitate an attack.


* CVE-2024-26889: Out-of-bounds write in core Bluetooth subsystem.

When using the HCIGETDEVINFO ioctl command, a buffer overflow is
possible if the device name is bigger than expected. A remote
attacker can exploit this flaw to cause a denial-of-service or
privilege escalation.


* CVE-2024-26901: Information leak in file handle syscalls.

Incorrect initialisation in file handle code in core fs subsystem can
lead to information leak. A local attacker can exploit this flaw to
extract sensitive information from the kernel memory or aid in other
types of attacks.


* CVE-2024-26923: Privilege escalation in Unix domain sockets.

A race condition when using Unix domain sockets could lead to garbage
collector racing with the connect() syscall. A local attacker could use
this flaw to escalate privileges.


* CVE-2024-26973: Information leak in FAT filesystem.

Uninitialised field in FAT filesystem can eventually lead to memory
leak. A local attacker can exploit this flaw to extract sensitive
information from the kernel memory or facilitate an attack.


* CVE-2024-26993: Resource leak in SysFS filesystem.

A logic error in the SysFS filesystem can lead to a resource leak.
An attacker can exploit this flaw to cause a denial-of-service or
aid in other types of attacks.


* CVE-2024-35897, CVE-2024-35900: Privilege escalation in netfilter subsystem.

A logical error in the netfilter subsystem in handling asynchronous
garbage collection and table updates can lead to a double free. A
local attacker can exploit this flaw to escalate privileges or aid
in other types of attacks.


* CVE-2024-35910: Denial-of-service in IPv4 TCP networking stack.

A logical error in IPv4 TCP networking stack when handling timers upon
a kernel socket release can lead to a null-pointer dereference. A local
attacker can exploit this flaw to cause a denial-of-service.


* CVE-2024-35950: Memory corruption in Direct Rendering Manager.

A locking error when using Direct Rendering Manager driver could lead to
a use-after-free. A local attacker could use this flaw to cause memory
corruption.


* CVE-2024-35973: Denial-of-service in Generic Network Virtualization Encapsulation.

A logic error when using Generic Network Virtualization Encapsulation
driver could lead to use of uninitialized memory. A local attacker could
use this flaw to cause a denial-of-service.


* Note: Oracle will no provide a zero-downtime update for CVE-2022-0001, CVE-2022-0002.

Oracle has determined that applying the kernel mitigation for this
vulnerability on a running system would not be safe and recommends
rebooting.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.