SB2019110518 - Red Hat update for yum

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2019110518

SB2019110518 - Red Hat update for yum

Published: November 5, 2019 Updated: November 6, 2019

Security Bulletin ID SB2019110518
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 vulnerabilities.


1) Input validation error (CVE-ID: CVE-2018-20534)

CWE-ID: CWE-20 - Improper input validation

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


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

The vulnerability exists due to insufficient validation of user-supplied input processed by the pool_whatprovides function, as defined in the ext/pool.h source code file of the affected software. A remote attacker can trick the victim into opening or executing a file that submits malicious input, trigger an illegal access address condition and cause the affected software to crash, resulting in a DoS condition.


2) Use-after-free (CVE-ID: CVE-2019-3817)

CWE-ID: CWE-416 - Use After Free

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


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when merging two ObjMRTrees while processing XML files in libcomps. A remote attacker can create a specially crafted XML file, pass it to the application, trigger a use-after-free error and crash the application or execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


Remediation

Install update from vendor's website.

References