SB2017071108 - Debian update for xorg-server
Published: July 11, 2017 Updated: July 13, 2017
Security Bulletin ID
SB2017071108
CSH Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2017-10971)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Amber
The vulnerability allows a remote authenticated attacker to execute arbitrary code.
The weakness exists due to stack-based buffer overflow in the endianness conversion of X Events. A remote attacker can trigger memory corruption and crash or execute code in the context of the X Server.
Successful exploitation of the vulnerability may result in system compromise.
2) Information disclosure (CVE-ID: CVE-2017-10972)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote authenticated attacker to obtain potentially sensitive information.
The weakness exists due to handling of uninitialized data in endianness conversion in the XEvent. A remote attacker can access potentially privileged data from the X server.
Successful exploitation of the vulnerability results in information disclosure.
Remediation
Install update from vendor's website.