CVE Vulnerabilities

CVE-2015-1869

Improper Link Resolution Before File Access ('Link Following')

Published: Jan 14, 2020 | Modified: Jan 21, 2020
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
7.2 IMPORTANT
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V3
Ubuntu

The default event handling scripts in Automatic Bug Reporting Tool (ABRT) allow local users to gain privileges as demonstrated by a symlink attack on a var_log_messages file.

Weakness

The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Affected Software

Name Vendor Start Version End Version
Automatic_bug_reporting_tool Redhat - -
Red Hat Enterprise Linux 6 RedHat abrt-0:2.0.8-26.el6_6.1 *
Red Hat Enterprise Linux 6 RedHat libreport-0:2.0.9-21.el6_6.1 *
Red Hat Enterprise Linux 7 RedHat abrt-0:2.1.11-22.ael7b_1 *
Red Hat Enterprise Linux 7 RedHat libreport-0:2.1.11-23.el7_1 *

Potential Mitigations

  • Follow the principle of least privilege when assigning access rights to entities in a software system.
  • Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

References