- Home
- CVEs with nessus.description==According to the versions of the cpupools / cpupools-features / etc
packages installed, the Virtuozzo installation on the remote host is
affected by the following vulnerabilities :
- Modern operating systems implement virtualization of
physical memory to efficiently use available system
resources and provide inter-domain protection through
access control and isolation. The L1TF issue was found
in the way the x86 microprocessor designs have
implemented speculative execution of instructions (a
commonly used performance optimisation) in combination
with handling of page-faults caused by terminated
virtual to physical address resolving process. As a
result, an unprivileged attacker could use this flaw to
read privileged memory of the kernel or other processes
and/or cross guest/host boundaries to read host memory
by conducting targeted cache side-channel attacks.
- An industry-wide issue was found in the way many modern
microprocessor designs have implemented speculative
execution of instructions past bounds check. The flaw
relies on the presence of a precisely-defined
instruction sequence in the privileged code and the
fact that memory writes occur to an address which
depends on the untrusted value. Such writes cause an
update into the microprocessor's data cache even for
speculatively executed instructions that never actually
commit (retire). As a result, an unprivileged attacker
could use this flaw to influence speculative execution
and/or read privileged memory by conducting targeted
cache side-channel attacks.
- A flaw named SegmentSmack was found in the way the
Linux kernel handled specially crafted TCP packets. A
remote attacker could use this flaw to trigger time and
calculation expensive calls to tcp_collapse_ofo_queue()
and tcp_prune_ofo_queue() functions by sending
specially modified packets within ongoing TCP sessions
which could lead to a CPU saturation and hence a denial
of service on the system. Maintaining the denial of
service condition requires continuous two-way TCP
sessions to a reachable open port, thus the attacks
cannot be performed using spoofed IP addresses.
- A flaw was found in Linux kernel's KVM virtualization
subsystem. The VMX code does not restore the GDT.LIMIT
to the previous host value, but instead sets it to
64KB. With a corrupted GDT limit a host's userspace
code has an ability to place malicious entries in the
GDT, particularly to the per-cpu variables. An attacker
can use this to escalate their privileges.
- Use-after-free vulnerability in the snd_pcm_info()
function in the ALSA subsystem in the Linux kernel
allows attackers to induce a kernel memory corruption
and possibly crash or lock up a system. Due to the
nature of the flaw, a privilege escalation cannot be
fully ruled out, although we believe it is unlikely.
- ALSA sequencer core initializes the event pool on
demand by invoking snd_seq_pool_init() when the first
write happens and the pool is empty. A user can reset
the pool size manually via ioctl concurrently, and this
may lead to UAF or out-of-bound access.
- In the Linux kernel versions 4.12, 3.10, 2.6, and
possibly earlier, a race condition vulnerability exists
in the sound system allowing for a potential deadlock
and memory corruption due to use-after-free condition
and thus denial of service. Due to the nature of the
flaw, privilege escalation cannot be fully ruled out,
although we believe it is unlikely.
Note that Tenable Network Security has extracted the preceding
description block directly from the Virtuozzo security advisory.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues.
Max CVSS | 0 |
Min CVSS | 0 |
Total Count | 2 |
| ID | CVSS | Summary | Last (major) update | Published |
Back to Top
Mark selected
Back to Top