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CVE-2018-6556

Status Candidate

Overview

lxc-user-nic when asked to delete a network interface will unconditionally open a user provided path. This code path may be used by an unprivileged user to check for the existence of a path which they wouldn't otherwise be able to reach. It may also be used to trigger side effects by causing a (read-only) open of special kernel files (ptmx, proc, sys). Affected releases are LXC: 2.0 versions above and including 2.0.9; 3.0 versions above and including 3.0.0, prior to 3.0.2.

Related Files

Gentoo Linux Security Advisory 201808-02
Posted Aug 22, 2018
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201808-2 - A vulnerability has been found in LXC which may allow for arbitrary file access (read-only). Versions less than 3.0.1-r1 are affected.

tags | advisory, arbitrary
systems | linux, gentoo
advisories | CVE-2018-6556
SHA-256 | 7a7aaad6cc77b7780bb81fbf0f9d045d51205c21539215c17706d8392217e11f
Download | Favorite | View
Ubuntu Security Notice USN-3730-1
Posted Aug 6, 2018
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3730-1 - Matthias Gerstner discovered that LXC incorrectly handled the lxc-user-nic utility. A local attacker could possibly use this issue to open arbitrary files.

tags | advisory, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2018-6556
SHA-256 | 20b451992a911148667d7967308162587130dc75ed9ecbf9dd9cb11668d1038b
Download | Favorite | View
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