SB2017113026 - SUSE Linux update for the Linux Kernel

Description

This security bulletin contains information about 6 secuirty vulnerabilities.

1) Memory corruption (CVE-ID: CVE-2017-1000253)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to an error when loading of Executable and Linkable Format (ELF) executables. A local user can create a specially crafted ELF binary, trigger memory corruption and execute arbitrary code on the vulnerable system with root privileges.

2) Key management errors (CVE-ID: CVE-2017-13080)

The vulnerability allows an adjacent attacker to force a supplicant to reinstall a previously used group key.

The weakness exists in the processing of the 802.11i 4-way handshake messages of the WPA and WPA2 protocols due to ambiguities in the processing of associated protocol messages. An adjacent attacker can use man-in-the-middle techniques to retransmit previously used message exchanges between supplicant and authenticator.

The vulnerability is dubbed "KRACK" attack.

3) Denial of service (CVE-ID: CVE-2017-14489)

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the drivers/scsi/scsi_transport_iscsi.c due to leveraging incorrect length validation. A local attacker can cause a denial of service.

4) 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.

5) NULL pointer dereference (CVE-ID: CVE-2017-15274)

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in he security/keys/keyctl.c due to a NULL pointer dereference. A local attacker can create a specially crafted add_key or keyctl system call and cause a denial of service.

6) NULL pointer dereference (CVE-ID: CVE-2017-12192)

The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists in the Key Management sub component of the Linux kernel when trying to issue a KEYTCL_READ on a negative key due to a NULL pointer dereference. A local attacker can cause the kernel and service to crash.

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2017-11/msg00082.html