High severity · published Aug 6, 2020
CVE-2020-15702
TOCTOU Race Condition vulnerability in apport allows a local attacker to escalate privileges and execute arbitrary code
7.0
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AP
Apport · Canonical
2.20.11-0ubuntu8; 2.20.11-0ubuntu9; 2.20.11-0ubuntu10; 2.20.11-0ubuntu11; 2.20.11-0ubuntu12; 2.20.11-0ubuntu13; +34 more · source: NVD
UL
Ubuntu Linux · Canonical
14.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-15702
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-15702
Vendor Advisory
https://usn.ubuntu.com/4449-1
Vendor Advisory
https://usn.ubuntu.com/4449-1/
Vendor Advisory
https://usn.ubuntu.com/4449-2/
Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-979/
seclists.org
http://seclists.org/fulldisclosure/2025/Jun/9
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