openEuler 22.03 LTS SP1 update for telnet

1) NULL pointer dereference

EUVDB-ID: #VU67777

Risk: Medium

CVSSv4.0: [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]

CVE-ID: CVE-2022-39028

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 22.03 LTS SP1

telnet-debuginfo: before 0.17-79

telnet-help: before 0.17-79

telnet-debugsource: before 0.17-79

telnet: before 0.17-79

CPE2.3

• cpe:2.3:o:openeuler:openeuler:22.03:LTS SP1:*:*:*:*:*:*
• cpe:2.3:o:openeuler:telnet-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:telnet-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:telnet-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:o:openeuler:telnet:*:*:*:*:*:openeuler:*:*

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2024-1354

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.