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Debian Security Advisory 4196-1

Debian Security Advisory 4196-1
Posted May 9, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4196-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation or denial of service.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2018-1087, CVE-2018-8897
SHA-256 | 93cc48d260bc7594d1b33464cbeae85c8108f7abd086bf698c5a407b0654ccb2

Debian Security Advisory 4196-1

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Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4196-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
May 08, 2018 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : linux
CVE ID : CVE-2018-1087 CVE-2018-8897
Debian Bug : 897427 897599 898067 898100

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation or denial of service.

CVE-2018-1087

Andy Lutomirski discovered that the KVM implementation did not
properly handle #DB exceptions while deferred by MOV SS/POP SS,
allowing an unprivileged KVM guest user to crash the guest or
potentially escalate their privileges.

CVE-2018-8897

Nick Peterson of Everdox Tech LLC discovered that #DB exceptions
that are deferred by MOV SS or POP SS are not properly handled,
allowing an unprivileged user to crash the kernel and cause a denial
of service.

For the oldstable distribution (jessie), these problems have been fixed
in version 3.16.56-1+deb8u1. This update includes various fixes for
regressions from 3.16.56-1 as released in DSA-4187-1 (Cf. #897427,
#898067 and #898100).

For the stable distribution (stretch), these problems have been fixed in
version 4.9.88-1+deb9u1. The fix for CVE-2018-1108 applied in DSA-4188-1
is temporarily reverted due to various regression, cf. #897599.

We recommend that you upgrade your linux packages.

For the detailed security status of linux please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/linux

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
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