SB2017081829 - Fedora 26 update for kernel
Published: August 18, 2017 Updated: April 24, 2025
Security Bulletin ID
SB2017081829
Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Privilege escalation (CVE-ID: CVE-2017-1000112)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists due to race condition in the UDP Fragmentation Offload (UFO) code. A local attacker can send specially crafted UFO packets, trigger memory corruption and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
2) Privilege escalation (CVE-ID: CVE-2017-1000111)
The vulnerability allows a local attacker to gain elevated privileges on the target system.The weakness exists in the packet_set_ring function due to improper implementation of raw packet sockets in the networking subsystem of the affected software that handles synchronization. A local attacker with CAP_NET_RAW permissions can open a raw packet socket, trigger a race condition, eventually cause use-after-free error and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
3) Privilege escalation (CVE-ID: CVE-2017-12134)
The vulnerability allows a local attacker on a Linux-based guest system to gain elevated privileges on the host system.The weakness exists due to aa flaw in merging adjacent block IO requests. A local attacker on the guest system can incorrectly access memory during block stream processing to obtain potentially sensitive information or gain elevated privileges on the host system.
Remediation
Install update from vendor's website.