ZDI-20-1417: X.Org Server XIChangeHierarchy Integer Underflow Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. 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 handling of XIChangeHierarchy requests. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-20-1417?
The severity of ZDI-20-1417 is considered high due to its potential for local privilege escalation.
How do I fix ZDI-20-1417?
To fix ZDI-20-1417, you should update your X.Org Server to the latest patched version.
Who is affected by ZDI-20-1417?
ZDI-20-1417 affects installations of X.Org Server that have not been updated to include the security fixes.
What kind of attacks can ZDI-20-1417 facilitate?
ZDI-20-1417 can facilitate local privilege escalation attacks by allowing attackers to gain higher-level access on affected systems.
Is ZDI-20-1417 a network vulnerability?
No, ZDI-20-1417 is not a network vulnerability; it requires local access to the system to be exploited.