SB2019090618 - Multiple vulnerabilities in QEMU

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Main Vulnerability Database SB2019090618

SB2019090618 - Multiple vulnerabilities in QEMU

Published: September 6, 2019 Updated: April 28, 2020

Security Bulletin ID SB2019090618
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Infinite loop (CVE-ID: CVE-2019-12068)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

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 due to infinite loop in lsi_execute_script() when reading empty opcode. A local user can consume all available system resources and cause denial of service conditions.


2) Memory leak (CVE-ID: CVE-2019-20382)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the zrle_compress_data() function in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd. A remote attacker can perform a denial of service attack.


Remediation

Install update from vendor's website.

References