SB2020111008 - CentOS 6 update for xorg-x11-server
Published: November 10, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2020-14345)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in XkbSetNames(). A local user can run a specially crafted program to trigger out-of-bounds read error and read contents of memory on the system.
2) Integer underflow (CVE-ID: CVE-2020-14346)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer underflow in the XIChangeHierarchy(). A local user can send a specially crafted request to the affected application, trigger integer underflow and execute arbitrary code on the target system with elevated privileges.
3) Integer underflow (CVE-ID: CVE-2020-14361)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer underflow in the XkbSelectEvents(). A local user can send a specially crafted request to the affected application, trigger integer underflow and execute arbitrary code on the target system with elevated privileges.
4) Integer underflow (CVE-ID: CVE-2020-14362)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer underflow in the XRecordRegisterClients(). A local user can send a specially crafted request to the affected application, trigger integer underflow and execute arbitrary code on the target system with elevated privileges.
Remediation
Install update from vendor's website.