Ubuntu update for inetutils
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2022-39028 CVE-2023-40303 |
| CWE-ID | CWE-476 CWE-252 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Ubuntu Operating systems & Components / Operating system inetutils-tools (Ubuntu package) Operating systems & Components / Operating system package or component inetutils-telnetd (Ubuntu package) Operating systems & Components / Operating system package or component |
| Vendor | Canonical Ltd. |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) NULL pointer dereference
EUVDB-ID: #VU67777
Risk: Medium
CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-39028
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe 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.
Update the affected package inetutils to the latest version.
Vulnerable software versionsUbuntu: 20.04 - 23.04
inetutils-tools (Ubuntu package): before 2:2.4-2ubuntu1.1
inetutils-telnetd (Ubuntu package): before 2:2.4-2ubuntu1.1
External linkshttp://ubuntu.com/security/notices/USN-6304-1
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Unchecked return value
EUVDB-ID: #VU79879
Risk: Low
CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-40303
CWE-ID:
CWE-252 - Unchecked Return Value
Exploit availability: No
DescriptionThe 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.
Update the affected package inetutils to the latest version.
Vulnerable software versionsUbuntu: 20.04 - 23.04
inetutils-tools (Ubuntu package): before 2:2.4-2ubuntu1.1
inetutils-telnetd (Ubuntu package): before 2:2.4-2ubuntu1.1
External linkshttp://ubuntu.com/security/notices/USN-6304-1
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
