SB2018051010 - SUSE Linux update for xen

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Out-of-bounds write (CVE-ID: CVE-2018-10471)

The vulnerability allows an adjacent attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to an unconditional write attempt of the value zero to an address near 2^64. An adjacent attacker can cause the service to crash or execute arbitrary code via unexpected INT 80 processing.

Successful exploitation of the vulnerability may result in system compromise.

2) Information disclosure (CVE-ID: CVE-2018-10472)

The vulnerability allows an adjacent attacker to obtain potentially sensitive information on the target system.

The weakness exists in certain configurations due to improper information control. An adjacent attacker can read arbitrary dom0 files via QMP live insertion of a CDROM, in conjunction with specifying the target file as the backing file of a snapshot.

3) Memory corruption (CVE-ID: CVE-2018-7550)

The vulnerability allows an adjacent attacker to execute arbitrary code on the target system.

The weakness exists in the load_multiboot function due to out-of-bounds read or write. An adjacent attacker can load a kernel image during the boot process, which may cause the mh_load_end_addr address to be greater than the mh_bss_end_addr address, trigger memory corruption and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

4) Privilege escalation (CVE-ID: CVE-2018-8897)

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

The vulnerability exists due to improper implementation of Intel 64 and IA-32 Architectures Software Developer's Manual (SDM) on multiple system kernels, which results in an unexpected behavior for #DB exceptions that are deferred by MOV SS or POP SS. A local user can execute arbitrary code with elevated privileges.

5) Information disclosure (CVE-ID: CVE-2017-5754)

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists in Intel CPU hardware due to side-channel attacks, which are also referred to as Meltdown attacks. A local attacker can execute arbitrary code, perform a side-channel analysis of the data cache and gain access to sensitive information including memory from the CPU cache.

Remediation

Install update from vendor's website.

References

• https://lists.opensuse.org/opensuse-security-announce/2018-05/msg00012.html