SB2020120706 - Gentoo update for X.Org X Server
Published: December 7, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 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) Improper Initialization (CVE-ID: CVE-2020-14347)
The vulnerability allows a local authenticated user to gain access to sensitive information.
A flaw was found in the way xserver memory was not properly initialized. This could leak parts of server memory to the X client. In cases where Xorg server runs with elevated privileges, this could result in possible ASLR bypass. Xorg-server before version 1.20.9 is vulnerable.
4) Out-of-bounds read (CVE-ID: CVE-2020-14360)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition when processing XkbSetMap requests. A local user can trigger an out-of-bounds read error and read contents of memory on the system.
5) 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.
6) 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.
7) Heap-based buffer overflow (CVE-ID: CVE-2020-25712)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within XkbSetDeviceInfo functionality. A local user can pass specially crafted data to the application, trigger heap-based buffer overflow and execute arbitrary code on the target system with elevated privileges.
Remediation
Install update from vendor's website.