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Debian Security Advisory DSA-3313-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
July 23, 2015 https://www.debian.org/security/faq
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Package : linux
CVE ID : CVE-2015-3290 CVE-2015-3291 CVE-2015-4167 CVE-2015-5157
CVE-2015-5364 CVE-2015-5366

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

CVE-2015-3290

Andy Lutomirski discovered that the Linux kernel does not properly
handle nested NMIs. A local, unprivileged user could use this flaw
for privilege escalation.

CVE-2015-3291

Andy Lutomirski discovered that under certain conditions a malicious
userspace program can cause the kernel to skip NMIs leading to a
denial of service.

CVE-2015-4167

Carl Henrik Lunde discovered that the UDF implementation is missing
a necessary length check. A local user that can mount devices could
use this flaw to crash the system.

CVE-2015-5157

Petr Matousek and Andy Lutomirski discovered that an NMI that
interrupts userspace and encounters an IRET fault is incorrectly
handled. A local, unprivileged user could use this flaw for denial
of service or possibly for privilege escalation.

CVE-2015-5364

It was discovered that the Linux kernel does not properly handle
invalid UDP checksums. A remote attacker could exploit this flaw to
cause a denial of service using a flood of UDP packets with invalid
checksums.

CVE-2015-5366

It was discovered that the Linux kernel does not properly handle
invalid UDP checksums. A remote attacker can cause a denial of
service against applications that use epoll by injecting a single
packet with an invalid checksum.

For the stable distribution (jessie), these problems have been fixed in
version 3.16.7-ckt11-1+deb8u2.

For the unstable distribution (sid), these problems have been fixed in
version 4.0.8-2 or earlier versions.

We recommend that you upgrade your linux packages.

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/