USN-5446-2

Max Justicz discovered that dpkg incorrectly handled unpacking certain source packages. If a user or an automated system were tricked into unpacking a specially crafted source package, a remote attacker could modify files outside the target unpack directory, leading to a denial of service or potentially gaining access to the system.

References

Affected packages

Ubuntu:Pro:16.04:LTS / dpkg

Package

Name: dpkg
Purl: pkg:deb/ubuntu/dpkg@1.18.4ubuntu1.7+esm1?arch=source&distro=esm-infra/xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.18.4ubuntu1.7+esm1

Affected versions

1.*

1.18.2ubuntu5

1.18.3ubuntu1

1.18.4ubuntu1

1.18.4ubuntu1.1

1.18.4ubuntu1.2

1.18.4ubuntu1.3

1.18.4ubuntu1.4

1.18.4ubuntu1.5

1.18.4ubuntu1.6

1.18.4ubuntu1.7

Ecosystem specific

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "dpkg",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        },
        {
            "binary_name": "dpkg-dbgsym",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        },
        {
            "binary_name": "dpkg-dev",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        },
        {
            "binary_name": "dselect",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        },
        {
            "binary_name": "dselect-dbgsym",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        },
        {
            "binary_name": "libdpkg-dev",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        },
        {
            "binary_name": "libdpkg-perl",
            "binary_version": "1.18.4ubuntu1.7+esm1"
        }
    ]
}