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Debian Security Advisory 4313-1

Debian Security Advisory 4313-1
Posted Oct 9, 2018
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4313-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2018-15471, CVE-2018-18021
SHA-256 | 797c41de95f8733f3df28d404c9d017668eebeaf3d6c62c025040cbb65ffd1ee

Debian Security Advisory 4313-1

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Hash: SHA512

- -------------------------------------------------------------------------
Debian Security Advisory DSA-4313-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
October 08, 2018 https://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : linux
CVE ID : CVE-2018-15471 CVE-2018-18021

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

CVE-2018-15471 (XSA-270)

Felix Wilhelm of Google Project Zero discovered a flaw in the hash
handling of the xen-netback Linux kernel module. A malicious or
buggy frontend may cause the (usually privileged) backend to make
out of bounds memory accesses, potentially resulting in privilege
escalation, denial of service, or information leaks.

https://xenbits.xen.org/xsa/advisory-270.html

CVE-2018-18021

It was discovered that the KVM subsystem on the arm64 platform does
not properly handle the KVM_SET_ON_REG ioctl. An attacker who can
create KVM based virtual machines can take advantage of this flaw
for denial of service (hypervisor panic) or privilege escalation
(arbitrarily redirect the hypervisor flow of control with full
register control).

For the stable distribution (stretch), these problems have been fixed in
version 4.9.110-3+deb9u6.

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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