[SECURITY] [DLA 310-1] linux-2.6 security update

Package : linux-2.6
Version : 2.6.32-48squeeze14
CVE ID : CVE-2015-0272 CVE-2015-5156 CVE-2015-5364 CVE-2015-5366
CVE-2015-5697 CVE-2015-5707 CVE-2015-6937

This update fixes the CVEs described below.

CVE-2015-0272

It was discovered that NetworkManager would set IPv6 MTUs based on
the values received in IPv6 RAs (Router Advertisements), without
sufficiently validating these values.  A remote attacker could
exploit this attack to disable IPv6 connectivity.  This has been
mitigated by adding validation in the kernel.

CVE-2015-5156

Jason Wang discovered that when a virtio_net device is connected
to a bridge in the same VM, a series of TCP packets forwarded
through the bridge may cause a heap buffer overflow.  A remote
attacker could use this to cause a denial of service (crash) 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.

CVE-2015-5697

A flaw was discovered in the md driver in the Linux kernel leading
to an information leak.

CVE-2015-5707

An integer overflow in the SCSI generic driver in the Linux kernel
was discovered. A local user with write permission on a SCSI generic
device could potentially exploit this flaw for privilege escalation.

CVE-2015-6937

It was found that the Reliable Datagram Sockets (RDS) protocol
implementation did not verify that an underlying transport exists
when creating a connection.  Depending on how a local RDS
application initialised its sockets, a remote attacker might be
able to cause a denial of service (crash) by sending a crafted
packet.

For the oldoldstable distribution (squeeze), these problems have been
fixed in version 2.6.32-48squeeze14.

For the oldstable distribution (wheezy), these problems have been
fixed in version 3.2.68-1+deb7u4 or earlier.

For the stable distribution (jessie), these problems have been fixed
in version 3.16.7-ckt11-1+deb8u4 or earlier.

–
Ben Hutchings - Debian developer, member of Linux kernel and LTS teams

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