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#use wml::debian::translation-check translation="c13faedbded510feb7e5f7ea5a004d0206db58d4" mindelta="-1"
# 주의: 불완전한 번역. 번역을 마친 다음 위의 'mindelta="-1"'을 지우십시오.
<define-tag description>보안 업데이트</define-tag>
<define-tag moreinfo>
<p>권한 상승, 서비스 거부 또는 정보 유출을 일으킬 수 있는 여러 취약점을 리눅스 커널에서 발견했습니다.
</p>
<ul>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2015-8553">CVE-2015-8553</a>
<p>Jan Beulich discovered that <a href="https://security-tracker.debian.org/tracker/CVE-2015-2150">CVE-2015-2150</a> was not completely
addressed. If a PCI physical function is passed through to a
Xen guest, the guest is able to access its memory and I/O
regions before enabling decoding of those regions. This could
result in a denial-of-service (unexpected NMI) on the host.</p>
<p>The fix for this is incompatible with qemu versions before 2.5.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2017-18509">CVE-2017-18509</a>
<p>Denis Andzakovic reported a missing type check in the IPv4 multicast
routing implementation. A user with the CAP_NET_ADMIN capability (in
any user namespace) could use this for denial-of-service (memory
corruption or crash) or possibly for privilege escalation.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2018-5995">CVE-2018-5995</a>
<p>ADLab of VenusTech discovered that the kernel logged the virtual
addresses assigned to per-CPU data, which could make it easier to
exploit other vulnerabilities.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2018-20836">CVE-2018-20836</a>
<p>chenxiang reported a race condition in libsas, the kernel
subsystem supporting Serial Attached SCSI (SAS) devices, which
could lead to a use-after-free. It is not clear how this might be
exploited.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2018-20856">CVE-2018-20856</a>
<p>Xiao Jin reported a potential double-free in the block subsystem,
in case an error occurs while initialising the I/O scheduler for a
block device. It is not clear how this might be exploited.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-1125">CVE-2019-1125</a>
<p>It was discovered that most x86 processors could speculatively
skip a conditional SWAPGS instruction used when entering the
kernel from user mode, and/or could speculatively execute it when
it should be skipped. This is a subtype of Spectre variant 1,
which could allow local users to obtain sensitive information from
the kernel or other processes. It has been mitigated by using
memory barriers to limit speculative execution. Systems using an
i386 kernel are not affected as the kernel does not use SWAPGS.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-3882">CVE-2019-3882</a>
<p>It was found that the vfio implementation did not limit the number
of DMA mappings to device memory. A local user granted ownership
of a vfio device could use this to cause a denial of service
(out-of-memory condition).</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-3900">CVE-2019-3900</a>
<p>It was discovered that vhost drivers did not properly control the
amount of work done to service requests from guest VMs. A
malicious guest could use this to cause a denial-of-service
(unbounded CPU usage) on the host.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-10207">CVE-2019-10207</a>
<p>The syzkaller tool found a potential null dereference in various
drivers for UART-attached Bluetooth adapters. A local user with
access to a pty device or other suitable tty device could use this
for denial-of-service (BUG/oops).</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-10638">CVE-2019-10638</a>
<p>Amit Klein and Benny Pinkas discovered that the generation of IP
packet IDs used a weak hash function, <q>jhash</q>. This could enable
tracking individual computers as they communicate with different
remote servers and from different networks. The <q>siphash</q>
function is now used instead.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-10639">CVE-2019-10639</a>
<p>Amit Klein and Benny Pinkas discovered that the generation of IP
packet IDs used a weak hash function that incorporated a kernel
virtual address. This hash function is no longer used for IP IDs,
although it is still used for other purposes in the network stack.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-13631">CVE-2019-13631</a>
<p>It was discovered that the gtco driver for USB input tablets could
overrun a stack buffer with constant data while parsing the device's
descriptor. A physically present user with a specially
constructed USB device could use this to cause a denial-of-service
(BUG/oops), or possibly for privilege escalation.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-13648">CVE-2019-13648</a>
<p>Praveen Pandey reported that on PowerPC (ppc64el) systems without
Transactional Memory (TM), the kernel would still attempt to
restore TM state passed to the sigreturn() system call. A local
user could use this for denial-of-service (oops).</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-14283">CVE-2019-14283</a>
<p>The syzkaller tool found a missing bounds check in the floppy disk
driver. A local user with access to a floppy disk device, with a
disk present, could use this to read kernel memory beyond the
I/O buffer, possibly obtaining sensitive information.</p></li>
<li><a href="https://security-tracker.debian.org/tracker/CVE-2019-14284">CVE-2019-14284</a>
<p>The syzkaller tool found a potential division-by-zero in the
floppy disk driver. A local user with access to a floppy disk
device could use this for denial-of-service (oops).</p>
<li>(CVE ID not yet assigned)
<p>Denis Andzakovic reported a possible use-after-free in the
TCP sockets implementation. A local user could use this for
denial-of-service (memory corruption or crash) or possibly
for privilege escalation.</p></li>
<li>(CVE ID not yet assigned)
<p>The netfilter conntrack subsystem used kernel addresses as
user-visible IDs, which could make it easier to exploit other
security vulnerabilities.</p></li>
<li>XSA-300
<p>Julien Grall reported that Linux does not limit the amount of memory
which a domain will attempt to balloon out, nor limits the amount of
"foreign / grant map" memory which any individual guest can consume,
leading to denial of service conditions (for host or guests).</p></li>
</ul>
<p>옛 안정 배포(stretch)에서, 이 문제를 버전 4.9.168-1+deb9u5에서 수정했습니다.</p>
<p>안정 배포(buster)에서, 이 문제를 버전 4.19.37-5+deb10u2 또는 이전에 수정했습니다.</p>
<p>linux 패키지를 업그레이드 하는 게 좋습니다.</p>
<p>linux의 자세한 보안 상태는 보안 추적 페이지를 참조하십시오:
<a href="https://security-tracker.debian.org/tracker/linux">https://security-tracker.debian.org/tracker/linux</a></p>
</define-tag>
# do not modify the following line
#include "$(ENGLISHDIR)/security/2019/dsa-4497.data"
|
