Debian DSA-3364-1 High: Kernel Privilege Escalation And DoS Threat

debian

September 21, 2015

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

Topics Covered

security advisory denial of service debian high kernel exploit

Summary

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-2015-2925

Jann Horn discovered that when a subdirectory of a filesystem is
bind-mounted into a container that has its own user and mount
namespaces, a process with CAP_SYS_ADMIN capability in the user
namespace can access files outside of the subdirectory. The
default Debian configuration mitigated this as it does not allow
unprivileged users to create new user namespaces.

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 servic...