============================================================================
Ubuntu Security Notice USN-2549-1
March 25, 2015

libarchive vulnerabilities
============================================================================

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

libarchive could be made to crash or overwrite files.

Software Description:
- libarchive: Library to read/write archive files

Details:

It was discovered that the libarchive bsdcpio utility extracted absolute
paths by default without using the --insecure flag, contrary to
expectations. If a user or automated system were tricked into extracting
cpio archives containing absolute paths, a remote attacker may be able to
write to arbitrary files. (CVE-2015-2304)

Fabian Yamaguchi discovered that libarchive incorrectly handled certain
type conversions. A remote attacker could possibly use this issue to cause
libarchive to crash, resulting in a denial of service. This issue only
affected Ubuntu 12.04 LTS. (CVE-2013-0211)

Update instructions:

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

Ubuntu 14.10:
  bsdcpio                         3.1.2-9ubuntu0.1
  libarchive13                    3.1.2-9ubuntu0.1

Ubuntu 14.04 LTS:
  bsdcpio                         3.1.2-7ubuntu2.1
  libarchive13                    3.1.2-7ubuntu2.1

Ubuntu 12.04 LTS:
  bsdcpio                         3.0.3-6ubuntu1.1
  libarchive12                    3.0.3-6ubuntu1.1

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-2549-1
  CVE-2013-0211, CVE-2015-2304

Package Information:
  https://launchpad.net/ubuntu/+source/libarchive/3.1.2-9ubuntu0.1
  https://launchpad.net/ubuntu/+source/libarchive/3.1.2-7ubuntu2.1
  https://launchpad.net/ubuntu/+source/libarchive/3.0.3-6ubuntu1.1