CVE-2021-32554 - Improper Link Resolution Before File Access ('Link Following')

Severity

55%

Complexity

18%

Confidentiality

60%

It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the xorg package apport hooks, it could expose private data to other local users.

CVSS 3.1 Base Score 5.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:P/I:N/A:N).

Overview

Type

Canonical Ubuntu Linux

First reported 3 years ago

2021-06-12 04:15:00

Last updated 3 years ago

2021-06-16 13:14:00

Affected Software

Canonical Ubuntu Linux 18.04 LTS Edition

18.04

Canonical Ubuntu Linux 20.04 LTS Edition

20.04

References

https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904

https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904

Issue Tracking, Vendor Advisory

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