SB2017101024 - Ubuntu update for Linux kernel (HWE)
Published: October 10, 2017
Security Bulletin ID
SB2017101024
Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Memory corruption (CVE-ID: CVE-2017-1000255)
The vulnerability allows a local user to execute arbitrary code with escalated privileges.The vulnerability exists due to a boundary error in the Linux kernel's when handling signal frame on PowerPC systems. A malicious local user process could craft a signal frame allowing an attacker to corrupt memory and execute arbitrary code on the target system with escalated privileges.
2) Divide by zero (CVE-ID: CVE-2017-14106)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists due to divide-by-zero error in the tcp_disconnect() function in net/ipv4/tcp.c. A local attacker can trigger a disconnect within a certain tcp_recvmsg code path and cause kernel panic.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.