CVE-2020-15702 - CVE House
Back to Database
Status published High CVE-2020-15702

TOCTOU in apport

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2020-15702

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Ryota Shiga

References

More from Canonical

View All →
CVE-2025-6966
Null-pointer dereference in python-apt TagSection.keys()
Medium 6.9
CVE-2025-6224
Key leakage in juju/utils certificates
Medium 6.5
CVE-2025-5689
Improper Permission Management in SSH Session Handling
High 8.5
CVE-2025-5467
Ubuntu Apport Insecure File Permissions Vulnerability
Low 1.9
CVE-2025-5199
LPE on Multipass for macOS
High 7.3

Affected Vendor

Affected Software

apport
Vulnerable Versions:
2.20.1, 2.20.9, 2.20.11

Timeline

Official Publish: August 6th, 2020
Last Modified: November 3rd, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-367

MITRE ATT&CK TTPs

T1574 Hijack Execution Flow
Privilege Escalation
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1036 Masquerading
Defense Evasion
T1485 Data Destruction
Impact
T1005 Data from Local System
Collection