SB2017122926 - Denial of service in Linux kernel EINJ

Description

This security bulletin contains information about 1 vulnerability.

1) Code injection (CVE-ID: CVE-2016-3695)

CWE-ID: CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists within the einj_error_inject() function in drivers/acpi/apei/einj.c in the Linux kernel, which allows local users to simulate hardware errors. A local user can cause a denial of service by leveraging failure to disable APEI error injection through EINJ when securelevel is set.

Remediation

Install update from vendor's website.

References

• http://www.securityfocus.com/bid/102327
• https://bugzilla.redhat.com/show_bug.cgi?id=1322755
• https://github.com/mjg59/linux/commit/d7a6be58edc01b1c66ecd8fcc91236bfbce0a420