Category Archives: Security

Security

Debian

DSA-3031 apt – security update

The Google Security Team discovered a buffer overflow vulnerability in
the HTTP transport code in apt-get. An attacker able to
man-in-the-middle a HTTP request to an apt repository can trigger the
buffer overflow, leading to a crash of the http apt method binary, or
potentially to arbitrary code execution.

Security

Debian Security Advisory 3029-1

Debian Linux Security Advisory 3029-1 – Antoine Delignat-Lavaud and Karthikeyan Bhargavan discovered that it was possible to reuse cached SSL sessions in unrelated contexts, allowing virtual host confusion attacks in some configurations by an attacker in a privileged network position.

Security

Red Hat Security Advisory 2014-1268-01

Red Hat Security Advisory 2014-1268-01 – KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM. Two integer overflow flaws were found in the QEMU block driver for QCOW version 1 disk images. A user able to supply a malicious image file to QEMU or to helper tools used in image conversion by services such as glance and nova could potentially use these flaws to cause memory corruption, resulting in a crash or possibly arbitrary code execution.

Security

Red Hat Security Advisory 2014-1281-01

Red Hat Security Advisory 2014-1281-01 – The kernel packages contain the Linux kernel, the core of any Linux operating system. An out-of-bounds memory access flaw was found in the Linux kernel’s system call auditing implementation. On a system with existing audit rules defined, a local, unprivileged user could use this flaw to leak kernel memory to user space or, potentially, crash the system.

Security

Ubuntu Security Notice USN-2352-1

Ubuntu Security Notice 2352-1 – Simon McVittie discovered that DBus incorrectly handled the file descriptors message limit. A local attacker could use this issue to cause DBus to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Alban Crequy discovered that DBus incorrectly handled a large number of file descriptor messages. A local attacker could use this issue to cause DBus to stop responding, resulting in a denial of service. This issue only applied to Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. Various other issues were also addressed.

Security

Ubuntu Security Notice USN-2351-1

Ubuntu Security Notice 2351-1 – Antoine Delignat-Lavaud and Karthikeyan Bhargavan discovered that nginx incorrectly reused cached SSL sessions. An attacker could possibly use this issue in certain configurations to obtain access to information from a different virtual host.