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CVE-2020-15702

Published: 4 August 2020

TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code. An attacker may exit the crashed process and exploit PID recycling to spawn a root process with the same PID as the crashed process, which can then be used to escalate privileges. Fixed in 2.20.1-0ubuntu2.24, 2.20.9 versions prior to 2.20.9-0ubuntu7.16 and 2.20.11 versions prior to 2.20.11-0ubuntu27.6. Was ZDI-CAN-11234.

Priority

Medium

Cvss 3 Severity Score

7.0

Score breakdown

Status

Package Release Status
apport
Launchpad, Ubuntu, Debian
trusty
Released (2.14.1-0ubuntu3.29+esm5)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (2.20.9-0ubuntu7.16)
eoan Ignored
(end of life)
focal
Released (2.20.11-0ubuntu27.6)
upstream Needs triage

xenial
Released (2.20.1-0ubuntu2.24)

Severity score breakdown

Parameter Value
Base score 7.0
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H