USN-6495-1: Linux kernel vulnerabilities

Read Time:30 Second

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

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USN-6492-1: Mosquitto vulnerabilities

Read Time:1 Minute, 28 Second

Kathrin Kleinhammer discovered that Mosquitto incorrectly handled certain
inputs. If a user or an automated system were provided with a specially crafted
input, a remote attacker could possibly use this issue to cause a denial of
service. This issue only affected Ubuntu 20.04 LTS. (CVE-2021-34431)

Zhanxiang Song discovered that Mosquitto incorrectly handled certain inputs. If
a user or an automated system were provided with a specially crafted input, a
remote attacker could possibly use this issue to cause an authorisation bypass.
This issue only affected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2021-34434)

Zhanxiang Song, Bin Yuan, DeQing Zou, and Hai Jin discovered that Mosquitto
incorrectly handled certain inputs. If a user or an automated system were
provided with a specially crafted input, a remote attacker could possibly use
this issue to cause a denial of service. This issue only affected Ubuntu 20.04
LTS and Ubuntu 22.04 LTS. (CVE-2021-41039)

Zhengjie Du discovered that Mosquitto incorrectly handled certain inputs. If a
user or an automated system were provided with a specially crafted input file,
a remote attacker could possibly use this issue to cause a denial of service.
(CVE-2023-0809)

It was discovered that Mosquitto incorrectly handled certain inputs. If a user
or an automated system were provided with a specially crafted input, a remote
attacker could possibly use this issue to cause a denial of service.
(CVE-2023-3592)

Mischa Bachmann discovered that Mosquitto incorrectly handled certain inputs.
If a user or an automated system were provided with a specially crafted input,
a remote attacker could possibly use this issue to cause a denial of service.
This issue was only fixed in Ubuntu 22.04 LTS and Ubuntu 23.04.
(CVE-2023-28366)

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USN-6497-1: Linux kernel (OEM) vulnerabilities

Read Time:43 Second

Maxim Levitsky discovered that the KVM nested virtualization (SVM)
implementation for AMD processors in the Linux kernel did not properly
handle x2AVIC MSRs. An attacker in a guest VM could use this to cause a
denial of service (host kernel crash). (CVE-2023-5090)

Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel
did not properly handle queue initialization failures in certain
situations, leading to a use-after-free vulnerability. A remote attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2023-5178)

Budimir Markovic discovered that the perf subsystem in the Linux kernel did
not properly handle events grouping, leading to an out-of-bounds write. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2023-5717)

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USN-6496-1: Linux kernel vulnerabilities

Read Time:43 Second

Ivan D Barrera, Christopher Bednarz, Mustafa Ismail, and Shiraz Saleem
discovered that the InfiniBand RDMA driver in the Linux kernel did not
properly check for zero-length STAG or MR registration. A remote attacker
could possibly use this to execute arbitrary code. (CVE-2023-25775)

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

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USN-6494-1: Linux kernel vulnerabilities

Read Time:2 Minute, 8 Second

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate some attributes passed from userspace. A local
attacker could use this to cause a denial of service (system crash) or
possibly expose sensitive information (kernel memory). (CVE-2023-39189)

Sunjoo Park discovered that the netfilter subsystem in the Linux kernel did
not properly validate u32 packets content, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-39192)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did
not properly validate SCTP data, leading to an out-of-bounds read
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly expose sensitive information. (CVE-2023-39193)

Lucas Leong discovered that the Netlink Transformation (XFRM) subsystem in
the Linux kernel did not properly handle state filters, leading to an out-
of-bounds read vulnerability. A privileged local attacker could use this to
cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2023-39194)

Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did
not properly handle socket buffers (skb) when performing IP routing in
certain circumstances, leading to a null pointer dereference vulnerability.
A privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-42754)

It was discovered that the USB ENE card reader driver in the Linux kernel
did not properly allocate enough memory when processing the storage device
boot blocks. A local attacker could use this to cause a denial of service.
(CVE-2023-45862)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

Budimir Markovic discovered that the perf subsystem in the Linux kernel did
not properly handle events grouping, leading to an out-of-bounds write. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2023-5717)

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USN-6493-2: hibagent update

Read Time:22 Second

USN-6493-1 fixed a vulnerability in hibagent. This update provides
the corresponding update for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

On Ubuntu 18.04 LTS and Ubuntu 16.04 LTS, the hibagent package has been
updated to add IMDSv2 support, as IMDSv1 uses an insecure protocol and is
no longer recommended.

In addition, on all releases, hibagent has been updated to do nothing if
ODH is configured.

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