CVE Vulnerabilities

CVE-2015-3147

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

Published: Jan 14, 2020 | Modified: Feb 12, 2023
CVSS 3.x
6.5
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS 2.x
4.9 MEDIUM
AV:N/AC:M/Au:S/C:N/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu

daemon/abrt-handle-upload.in in Automatic Bug Reporting Tool (ABRT), when moving problem reports from /var/spool/abrt-upload, allows local users to write to arbitrary files or possibly have other unspecified impact via a symlink attack on (1) /var/spool/abrt or (2) /var/tmp/abrt.

Weakness

The product 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 - (including) - (including)
Enterprise_linux_desktop Redhat 7.0 (including) 7.0 (including)
Enterprise_linux_server Redhat 7.0 (including) 7.0 (including)
Enterprise_linux_server_aus Redhat 7.3 (including) 7.3 (including)
Enterprise_linux_server_aus Redhat 7.4 (including) 7.4 (including)
Enterprise_linux_server_aus Redhat 7.6 (including) 7.6 (including)
Enterprise_linux_server_aus Redhat 7.7 (including) 7.7 (including)
Enterprise_linux_server_eus Redhat 7.1 (including) 7.1 (including)
Enterprise_linux_server_eus Redhat 7.2 (including) 7.2 (including)
Enterprise_linux_server_eus Redhat 7.3 (including) 7.3 (including)
Enterprise_linux_server_eus Redhat 7.4 (including) 7.4 (including)
Enterprise_linux_server_eus Redhat 7.5 (including) 7.5 (including)
Enterprise_linux_server_eus Redhat 7.6 (including) 7.6 (including)
Enterprise_linux_server_eus Redhat 7.7 (including) 7.7 (including)
Enterprise_linux_server_tus Redhat 7.3 (including) 7.3 (including)
Enterprise_linux_server_tus Redhat 7.6 (including) 7.6 (including)
Enterprise_linux_server_tus Redhat 7.7 (including) 7.7 (including)
Enterprise_linux_workstation Redhat 7.0 (including) 7.0 (including)

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