Linux Security Kernel Update DSA-5173-1

38 Sicherheitslücken und 3 Bugs wurden im Linux Kernel gefunden. Ein Upgrade wird dringend empfohlen. Der gefixte Kernel liegt aktuell nur für Buster (Security) in Version 4.19.249-2 vor.

Linux Kernel Security DSA-5173-1

CVE-2021-4197

Eric Biederman reported that incorrect permission checks in the
cgroup process migration implementation can allow a local attacker
to escalate privileges.

CVE-2022-0494

The scsi_ioctl() was susceptible to an information leak only
exploitable by users with CAP_SYS_ADMIN or CAP_SYS_RAWIO
capabilities.

CVE-2022-0812

It was discovered that the RDMA transport for NFS (xprtrdma)
miscalculated the size of message headers, which could lead to a
leak of sensitive information between NFS servers and clients.

CVE-2022-0854

Ali Haider discovered a potential information leak in the DMA
subsystem. On systems where the swiotlb feature is needed, this
might allow a local user to read sensitive information.

CVE-2022-1011

Jann Horn discovered a flaw in the FUSE (Filesystem in User-Space)
implementation. A local user permitted to mount FUSE filesystems
could exploit this to cause a use-after-free and read sensitive
information.

CVE-2022-1012, CVE-2022-32296

Moshe Kol, Amit Klein, and Yossi Gilad discovered a weakness
in randomisation of TCP source port selection.

CVE-2022-1016

David Bouman discovered a flaw in the netfilter subsystem where
the nft_do_chain function did not initialize register data that
nf_tables expressions can read from and write to. A local attacker
can take advantage of this to read sensitive information.

CVE-2022-1048

Hu Jiahui discovered a race condition in the sound subsystem that
can result in a use-after-free. A local user permitted to access a
PCM sound device can take advantage of this flaw to crash the
system or potentially for privilege escalation.

CVE-2022-1184

A flaw was discovered in the ext4 filesystem driver which can lead
to a use-after-free. A local user permitted to mount arbitrary
filesystems could exploit this to cause a denial of service (crash
or memory corruption) or possibly for privilege escalation.

CVE-2022-1195

Lin Ma discovered race conditions in the 6pack and mkiss hamradio
drivers, which could lead to a use-after-free. A local user could
exploit these to cause a denial of service (memory corruption or
crash) or possibly for privilege escalation.

CVE-2022-1198

Duoming Zhou discovered a race condition in the 6pack hamradio
driver, which could lead to a use-after-free. A local user could
exploit this to cause a denial of service (memory corruption or
crash) or possibly for privilege escalation.

CVE-2022-1199, CVE-2022-1204, CVE-2022-1205

Duoming Zhou discovered race conditions in the AX.25 hamradio
protocol, which could lead to a use-after-free or null pointer
dereference. A local user could exploit this to cause a denial of
service (memory corruption or crash) or possibly for privilege
escalation.

CVE-2022-1353

The TCS Robot tool found an information leak in the PF_KEY
subsystem. A local user can receive a netlink message when an
IPsec daemon registers with the kernel, and this could include
sensitive information.

CVE-2022-1419

Minh Yuan discovered a race condition in the vgem virtual GPU
driver that can lead to a use-after-free. A local user permitted
to access the GPU device can exploit this to cause a denial of
service (crash or memory corruption) or possibly for privilege
escalation.

CVE-2022-1516

A NULL pointer dereference flaw in the implementation of the X.25
set of standardized network protocols, which can result in denial
of service.

This driver is not enabled in Debian’s official kernel
configurations.

CVE-2022-1652

Minh Yuan discovered a race condition in the floppy driver that
can lead to a use-after-free. A local user permitted to access a
floppy drive device can exploit this to cause a denial of service
(crash or memory corruption) or possibly for privilege escalation.

CVE-2022-1729

Norbert Slusarek discovered a race condition in the perf subsystem
which could result in local privilege escalation to root. The
default settings in Debian prevent exploitation unless more
permissive settings have been applied in the
kernel.perf_event_paranoid sysctl.

CVE-2022-1734

Duoming Zhou discovered race conditions in the nfcmrvl NFC driver
that could lead to a use-after-free, double-free or null pointer
dereference. A local user might be able to exploit these for
denial of service (crash or memory corruption) or possibly for
privilege escalation.

This driver is not enabled in Debian’s official kernel
configurations.

CVE-2022-1974, CVE-2022-1975

Duoming Zhou discovered that the NFC netlink interface was
suspectible to denial of service.

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-2022-21123, CVE-2022-21125, CVE-2022-21166

Various researchers discovered flaws in Intel x86 processors,
collectively referred to as MMIO Stale Data vulnerabilities.
These are similar to the previously published Microarchitectural
Data Sampling (MDS) issues and could be exploited by local users
to leak sensitive information.

For some CPUs, the mitigations for these issues require updated
microcode. An updated intel-microcode package may be provided at
a later date. The updated CPU microcode may also be available as
part of a system firmware („BIOS“) update.

Further information on the mitigation can be found at
<https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/processor_mmio_stale_data.html>
or in the linux-doc-4.19 package.

CVE-2022-23960

Researchers at VUSec discovered that the Branch History Buffer in
Arm processors can be exploited to create information side-
channels with speculative execution. This issue is similar to
Spectre variant 2, but requires additional mitigations on some
processors.

This was previously mitigated for 32-bit Arm (armel and armhf)
architectures and is now also mitigated for 64-bit Arm (arm64).

This can be exploited to obtain sensitive information from a
different security context, such as from user-space to the kernel,
or from a KVM guest to the kernel.

CVE-2022-26490

Buffer overflows in the STMicroelectronics ST21NFCA core driver
can result in denial of service or privilege escalation.

This driver is not enabled in Debian’s official kernel
configurations.

CVE-2022-27666

„valis“ reported a possible buffer overflow in the IPsec ESP
transformation code. A local user can take advantage of this flaw
to cause a denial of service or for privilege escalation.

CVE-2022-28356

„Beraphin“ discovered that the ANSI/IEEE 802.2 LLC type 2 driver did
not properly perform reference counting on some error paths. A
local attacker can take advantage of this flaw to cause a denial
of service.

CVE-2022-28388

A double free vulnerability was discovered in the 8 devices
USB2CAN interface driver.

CVE-2022-28389

A double free vulnerability was discovered in the Microchip CAN
BUS Analyzer interface driver.

CVE-2022-28390

A double free vulnerability was discovered in the EMS CPC-USB/ARM7
CAN/USB interface driver.

CVE-2022-29581

Kyle Zeng discovered a reference-counting bug in the cls_u32
network classifier which can lead to a use-after-free. A local
user can exploit this to cause a denial of service (crash or
memory corruption) or possibly for privilege escalation.

CVE-2022-30594

Jann Horn discovered a flaw in the interaction between ptrace and
seccomp subsystems. A process sandboxed using seccomp() but still
permitted to use ptrace() could exploit this to remove the seccomp
restrictions.

CVE-2022-32250

Aaron Adams discovered a use-after-free in Netfilter which may
result in local privilege escalation to root.

CVE-2022-33981

Yuan Ming from Tsinghua University reported a race condition in
the floppy driver involving use of the FDRAWCMD ioctl, which could
lead to a use-after-free. A local user with access to a floppy
drive device could exploit this to cause a denial of service
(crash or memory corruption) or possibly for privilege escalation.
This ioctl is now disabled by default.

For the oldstable distribution (buster), these problems have been
fixed in version 4.19.249-2.

Due to an issue in the signing service (Cf. Debian bug #1012741), the
vport-vxlan module cannot be loaded for the signed kernel for amd64 in
this update.

This update also corrects a regression in the network scheduler
subsystem (bug #1013299).

For the 32-bit Arm (armel and armhf) architectures, this update
enables optimised implementations of several cryptographic and CRC
algorithms. For at least AES, this should remove a timing side-
channel that could lead to a leak of sensitive information.

This update includes many more bug fixes from stable updates
4.19.236-4.19.249 inclusive, including for bug #1006346. The random
driver has been backported from Linux 5.19, fixing numerous
performance and correctness issues. Some changes will be visible:

– – The entropy pool size is now 256 bits instead of 4096. You may need
to adjust the configuration of system monitoring or user-space
entropy gathering services to allow for this.

– – On systems without a hardware RNG, the kernel may log more uses of
/dev/urandom before it is fully initialised. These uses were
previously under-counted and this is not a regression.

Quelle: https://security-tracker.debian.org/tracker/source-package/linux