SB2018121213 - Red Hat update for kernel

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Main Vulnerability Database SB2018121213

SB2018121213 - Red Hat update for kernel

Published: December 12, 2018 Updated: December 17, 2018

Security Bulletin ID SB2018121213
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Use-after-free error (CVE-ID: CVE-2017-8824)

The vulnerability allows a local attacker to gain elevated privileges or cause DoS condition on the target system.

The weakness exists due to an error in the dccp_disconnect function in net/dccp/proto.c in the Linux kernel. A local attacker can make specially crafted AF_UNSPEC connect system call during the DCCP_LISTEN state, trigger use-after-free error and gain root privileges or cause the system to crash.

2) NULL pointer dereference (CVE-ID: CVE-2017-11176)

The vulnerability allows a remote attacker to cause DoS condition.

The vulnerability exists due to the mq_notify function does not set the sock pointer to NULL upon entry into the retry logic. A remote attacker can trigger use-after-free error during a user-space close of a Netlink socket and cause the service to crash.


3) 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.


Remediation

Install update from vendor's website.

References