SB2017112130 - Ubuntu update for Linux kernel (Xenial HWE)
Published: November 21, 2017
Security Bulletin ID
SB2017112130
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) Use-after-free (CVE-ID: CVE-2017-15265)
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The vulnerability exists due to use-after-free error in the ALSA sequencer interface (/dev/snd/seq). A local attacker can run a specially crafted application, trigger memory corruption and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
2) Null pointer dereference (CVE-ID: CVE-2017-15299)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists due to the KEYS subsystem mishandles use of add_key for a key that already exists but is uninstantiated. A local attacker can supply specially crafted keys, trigger null pointer dereference and cause the service to crash.
Successful exploitation of the vulnerability results in denial of service.
Remediation
Install update from vendor's website.