SB2018042522 - SUSE Linux update for kvm

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Main Vulnerability Database SB2018042522

SB2018042522 - SUSE Linux update for kvm

Published: April 25, 2018

Security Bulletin ID SB2018042522
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

Medium 25% Low 75%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2017-18030)

CWE-ID: CWE-125 - Out-of-bounds read

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


The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists in the cirrus_invalidate_region function in hw/display/cirrus_vga.c due to out-of-bounds read. A remote attacker can use vectors related to negative pitch, trigger memory error and cause QEMU process to crash.

2) Information disclosure (CVE-ID: CVE-2017-5715)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

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


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

The vulnerability exists in Intel CPU hardware due to improper implementation of the speculative execution of instructions. A local attacker can utilize branch target injection, execute arbitrary code, perform a side-channel attack and read sensitive memory information.


3) Out-of-bounds read (CVE-ID: CVE-2018-5683)

CWE-ID: CWE-125 - Out-of-bounds read

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


The vulnerability allows an adjacent low-privileged attacker to cause DoS condition on the target system.

The weakness exists in the vga_draw_text function due to out-of-bounds read. A remote attacker can leverage improper memory address validation, trigger memory error and cause QEMU process to crash.

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

CWE-ID: CWE-119 - Memory corruption

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


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.

Remediation

Install update from vendor's website.

References