SB2023082321 - Ubuntu update for inetutils

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Main Vulnerability Database SB2023082321

SB2023082321 - Ubuntu update for inetutils

Published: August 23, 2023

Security Bulletin ID SB2023082321
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Adjecent network
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 vulnerabilities.


1) NULL pointer dereference (CVE-ID: CVE-2022-39028)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/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 telnetd daemon. A remote attacker can trigger NULL pointer dereference via 0xff 0xf7 or 0xff 0xf8 and crash telnetd.


2) Unchecked return value (CVE-ID: CVE-2023-40303)

CWE-ID: CWE-252 - Unchecked Return Value

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


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to usage of an unchecked return values of set*id() family functions in ftpd, rcp, rlogin, rsh, rshd, and uucpd while the setuid system call fails when a process is trying to drop privileges before letting an ordinary user control the activities of the process. A local user can abuse this situation and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References