CVE-2021-32550 - 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 openjdk-14 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

2021-06-15 15:27:00

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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