SB2021052039 - Red Hat Enterprise Linux 8 update for evolution

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021052039

SB2021052039 - Red Hat Enterprise Linux 8 update for evolution

Published: May 20, 2021

Security Bulletin ID SB2021052039
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2020-16117)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 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/E:U/U:Green


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

The vulnerability exists due to a NULL pointer dereference error in GNOME evolution-data-server before 3.35.91, a malicious server can crash the mail client with a NULL pointer dereference by sending an invalid (e.g., minimal) CAPABILITY line on a connection attempt. This is related to imapx_free_capability and imapx_connect_to_server. A remote attacker can perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References