SB2016082311 - Red Hat Enterprise Linux 7 update for kernel
Published: August 23, 2016 Updated: April 24, 2025
Security Bulletin ID
SB2016082311
Severity
Low
Patch available
YES
Number of vulnerabilities
3
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 3 secuirty vulnerabilities.
1) Data handling (CVE-ID: CVE-2016-4470)
The vulnerability allows a local attacker to cause DoS condition on the target system.The weakness exists in the key_reject_and_link function in security/keys/key.c due to it does not ensure that a certain data structure is initialized. A local attacker can cause the service to crash via vectors involving a crafted keyctl request2 command.
2) Privilege escalation (CVE-ID: CVE-2016-4565)
The vulnerability allows a local attacker to cause DoS condition or gain elevated privileges on the target system.The weakness exists due to it incorrectly relies on the write system call. A local attacker can cause the service to crash or gain root privileges.
3) Man-in-the-middle attack (CVE-ID: CVE-2016-5696)
The vulnerability allows a remote attacker to write arbitrary files and cause DoS condition on the target system.
The weakness exists due to an error in net/ipv4/tcp_input.c while determining the rate of challenge ACK segments. A remote attacker can perform man-in-the-middle attack and hijack TCP sessions via a blind in-window attack.
Remediation
Install update from vendor's website.