Category Archives: Security

Security

Ubuntu

USN-3256-2: Linux kernel (HWE) vulnerability

Ubuntu Security Notice USN-3256-2

4th April, 2017

linux-hwe, linux-lts-trusty, linux-lts-xenial vulnerability

A security issue affects these releases of Ubuntu and its
derivatives:

  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

Summary

The system could be made to crash under certain conditions.

Software description

  • linux-hwe
    – Linux hardware enablement (HWE) kernel

  • linux-lts-trusty
    – Linux hardware enablement kernel from Trusty for Precise

  • linux-lts-xenial
    – Linux hardware enablement kernel from Xenial for Trusty

Details

USN-3256-1 fixed vulnerabilities in the Linux kernel for Ubuntu
14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. This update provides
the corresponding updates for the Linux Hardware Enablement (HWE)
kernel for each of the respective prior Ubuntu LTS releases.

Andrey Konovalov discovered that the AF_PACKET implementation in the Linux
kernel did not properly validate certain block-size data. A local attacker
could use this to cause a denial of service (system crash).

Update instructions

The problem can be corrected by updating your system to the following
package version:

Ubuntu 16.04 LTS:
linux-image-4.8.0-46-lowlatency

4.8.0-46.49~16.04.1
linux-image-lowlatency-hwe-16.04

4.8.0.46.18
linux-image-4.8.0-46-generic-lpae

4.8.0-46.49~16.04.1
linux-image-generic-hwe-16.04

4.8.0.46.18
linux-image-4.8.0-46-generic

4.8.0-46.49~16.04.1
linux-image-generic-lpae-hwe-16.04

4.8.0.46.18
Ubuntu 14.04 LTS:
linux-image-powerpc-smp-lts-xenial

4.4.0.72.59
linux-image-4.4.0-72-generic

4.4.0-72.93~14.04.1
linux-image-4.4.0-72-powerpc-smp

4.4.0-72.93~14.04.1
linux-image-4.4.0-72-powerpc-e500mc

4.4.0-72.93~14.04.1
linux-image-generic-lpae-lts-xenial

4.4.0.72.59
linux-image-4.4.0-72-generic-lpae

4.4.0-72.93~14.04.1
linux-image-4.4.0-72-lowlatency

4.4.0-72.93~14.04.1
linux-image-lowlatency-lts-xenial

4.4.0.72.59
linux-image-generic-lts-xenial

4.4.0.72.59
linux-image-powerpc64-smp-lts-xenial

4.4.0.72.59
linux-image-4.4.0-72-powerpc64-smp

4.4.0-72.93~14.04.1
linux-image-powerpc-e500mc-lts-xenial

4.4.0.72.59
Ubuntu 12.04 LTS:
linux-image-generic-lpae-lts-trusty

3.13.0.116.107
linux-image-3.13.0-116-generic

3.13.0-116.163~precise1
linux-image-generic-lts-trusty

3.13.0.116.107
linux-image-3.13.0-116-generic-lpae

3.13.0-116.163~precise1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

CVE-2017-7308

NVD

CVE-2017-7358

In LightDM through 1.22.0, a directory traversal issue in debian/guest-account.sh allows local attackers to own arbitrary directory path locations and escalate privileges to root when the guest user logs out.

NVD

CVE-2017-2671

The ping_unhash function in net/ipv4/ping.c in the Linux kernel through 4.10.8 is too late in obtaining a certain lock and consequently cannot ensure that disconnect function calls are safe, which allows local users to cause a denial of service (panic) by leveraging access to the protocol value of IPPROTO_ICMP in a socket system call.

Security

SolarWind LEM Default SSH Password Remote Code Execution

This Metasploit module exploits the default credentials of SolarWind LEM. A menu system is encountered when the SSH service is accessed with the default username and password which is “cmc” and “password”. By exploiting a vulnerability that exist on the menuing script, an attacker can escape from restricted shell. This Metasploit module was tested against SolarWinds LEM v6.3.1.

NVD

CVE-2017-5649

Apache Geode before 1.1.1, when a cluster has enabled security by setting the security-manager property, allows remote authenticated users with CLUSTER:READ but not DATA:READ permission to access the data browser page in Pulse and consequently execute an OQL query that exposes data stored in the cluster.