apport read_file() function could follow maliciously constructed symbolic links
CVE-2021-32548

7.3HIGH

Key Information:

Vendor

Canonical

Status
Apport
Vendor
CVE Published:
12 June 2021

What is CVE-2021-32548?

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-8 package apport hooks, it could expose private data to other local users.

Affected Version(s)

apport 2.20.1 < 2.20.1-0ubuntu2.30+esm1

apport 2.20.9 < 2.20.9-0ubuntu7.24

apport 2.20.11-0ubuntu27 < 2.20.11-0ubuntu27.18

References

https://bugs.launchpad.net/ubuntu/+source/apport/+bug/191...
x_refsource_MISC

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

maik@secfault-security.com (@fktio)
.