SB2018042039 - SUSE Linux update for the Linux Kernel

Description

This security bulletin contains information about 3 vulnerabilities.

1) Privilege escalation (CVE-ID: CVE-2017-13166)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The weakness exists in the V4L2 video driver component of the Google Android kernel due to insufficient validation of user-supplied input. A local attacker can use a specially crafted application and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

2) Privilege escalation (CVE-ID: CVE-2018-1068)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The weakness exists due to an error in the implementation of 32 bit syscall interface. A local attacker can gain root privileges.

3) Memory corruption (CVE-ID: CVE-2018-7566)

CWE-ID: CWE-119 - Memory corruption

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local attacker to write arbitrary files on the target system.

The weakness exists due to out-of-bounds write while ALSA sequencer core initializes the event pool on demand by invoking snd_seq_pool_init() when the first write happens and the pool is empty. A local attacker can trigger buffer overflow and use after free and reset the pool size manually via ioctl concurrently and write arbitrary files.

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2018-04/msg00029.html