SB2018071127 - Out-of-bounds write in Linux kernel

Description

This security bulletin contains information about 1 security vulnerability.

1) Out-of-bounds write (CVE-ID: CVE-2018-10882)

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists due to out-of-bounds write error in the fs/jbd2/transaction.csource code in the fourth extended filesystem (ext4). A local attacker can unmount a specially crafted ext4 filesystem image, trigger memory corruption and cause the service to crash or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.112
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.140
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.17.6
• https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.55