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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Apport | 2.20.11-0ubuntu8 |
| Canonical | Ubuntu Linux | 20.04 |
Related Weaknesses (CWE)
References
- https://usn.ubuntu.com/4449-1Vendor Advisory
- https://usn.ubuntu.com/4449-1/Vendor Advisory
- https://usn.ubuntu.com/4449-2/Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-979/Third Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2025/Jun/9
- https://usn.ubuntu.com/4449-1Vendor Advisory
- https://usn.ubuntu.com/4449-1/Vendor Advisory
- https://usn.ubuntu.com/4449-2/Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-20-979/Third Party AdvisoryVDB Entry
FAQ
What is CVE-2020-15702?
CVE-2020-15702 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 r...
How severe is CVE-2020-15702?
CVE-2020-15702 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-15702?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Apport, Canonical Ubuntu Linux.