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CVE-2011-4105

Status Candidate

Overview

LightDM before 1.0.6 allows local users to change ownership of arbitrary files via a symlink attack on ~/.Xauthority.

Related Files

Ubuntu Security Notice USN-1262-1
Posted Nov 16, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1262-1 - It was discovered that Light Display Manager incorrectly handled privileges when reading .dmrc files. A local attacker could exploit this issue to read arbitrary configuration files, bypassing intended permissions. It was discovered that Light Display Manager incorrectly handled links when adjusting permissions on .Xauthority files. A local attacker could exploit this issue to access arbitrary files, and possibly obtain increased privileges. In the default Ubuntu installation, this would be prevented by the Yama link restrictions. Various other issues were also addressed.

tags | advisory, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2011-3153, CVE-2011-4105
SHA-256 | 61e40ebb8859955a63f234353d30af5813f52ebbb4d3496c598362dec3d4de19
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