CVE-2020-15702

HIGH

apport - Time-of-check Time-of-use Race Condition via PID Recycling

Title source: llm
STIX 2.1

Description

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.

References (5)

Core 5
Core References
Vendor Advisory x_refsource_confirm
https://usn.ubuntu.com/4449-1
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4449-1/
Third Party Advisory, VDB Entry x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-20-979/
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4449-2/

Scores

CVSS v3 7.0
EPSS 0.0004
EPSS Percentile 13.6%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-367
Status published
Products (50)
canonical/apport 2.20.11-0ubuntu8
canonical/apport 2.20.11-0ubuntu9
canonical/apport 2.20.11-0ubuntu10
canonical/apport 2.20.11-0ubuntu11
canonical/apport 2.20.11-0ubuntu12
canonical/apport 2.20.11-0ubuntu13
canonical/apport 2.20.11-0ubuntu14
canonical/apport 2.20.11-0ubuntu15
canonical/apport 2.20.11-0ubuntu16
canonical/apport 2.20.11-0ubuntu17
... and 40 more
Published Aug 06, 2020
Tracked Since Feb 18, 2026