SB2023103014 - Ubuntu update for exim4

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Main Vulnerability Database SB2023103014

SB2023103014 - Ubuntu update for exim4

Published: October 30, 2023

Security Bulletin ID SB2023103014
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 vulnerabilities.


1) Buffer overflow (CVE-ID: CVE-2023-42117)

CWE-ID: CWE-119 - Memory corruption

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


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the smtp service. A remote attacker can send specially crafted data to the server, trigger memory corruption and execute arbitrary code on the target system.


2) Out-of-bounds read (CVE-ID: CVE-2023-42119)

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

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


The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in dnsdb implementation. A remote attacker can send specially crafted data to the server, trigger an out-of-bounds read error and read contents of memory on the system.


Remediation

Install update from vendor's website.

References