ZDI-CAN-11234: Canonical Ubuntu apport Time-Of-Check Time-Of-Use Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Canonical Ubuntu. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the apport package. The issue results from the lack of proper locking when performing operations on a file. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ubuntu Unattended Upgrades |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of ZDI-CAN-11234?
The severity of ZDI-CAN-11234 is rated as high due to its potential for privilege escalation.
How do I fix ZDI-CAN-11234?
To fix ZDI-CAN-11234, ensure that your Ubuntu installation is updated to the latest version provided by Canonical.
Who is affected by ZDI-CAN-11234?
ZDI-CAN-11234 affects installations of Canonical Ubuntu that have not been patched against this vulnerability.
What type of vulnerability is ZDI-CAN-11234?
ZDI-CAN-11234 is a privilege escalation vulnerability that allows local attackers to gain elevated access to the system.
What must an attacker do to exploit ZDI-CAN-11234?
An attacker must first have the capability to execute low-privileged code on the affected system to exploit ZDI-CAN-11234.
- agent/references
- agent/severity
- agent/title
- agent/description
- agent/source
- agent/type
- agent/softwarecombine
- agent/tags
- agent/event
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-20-979
- alias/ZDI-CAN-11234
- alias/CVE-2020-15702
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/canonical
- canonical/ubuntu unattended upgrades