SUSE update for telnet

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

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

Update the affected package telnet to the latest version.

Vulnerable software versions

SUSE Enterprise Storage: 6 - 7.1

SUSE Linux Enterprise Module for Legacy Software: 15-SP3 - 15-SP4

SUSE Manager Retail Branch Server: 4.1 - 4.3

SUSE Linux Enterprise Storage: 7.1

SUSE Linux Enterprise Server for SAP Applications: 12-SP4 - 15-SP4

SUSE Linux Enterprise High Performance Computing: 12 - 15-SP4

SUSE Linux Enterprise Server: 11-SP3-CLIENT-TOOLS-BETA - 15-SP4

SUSE Manager Server: 4.1 - 4.3

SUSE Manager Proxy: 4.1 - 4.3

SUSE Linux Enterprise Server for SAP: 15-SP1 - 15-SP2

SUSE Linux Enterprise Module for Basesystem: 15-SP3 - 15-SP4

SUSE Linux Enterprise Desktop: 15-SP3 - 15-SP4

SUSE CaaS Platform: 4.0

openSUSE Leap: 15.3 - 15.4

telnet-server-debuginfo: before 1.2-150000.3.6.1

telnet-server: before 1.2-150000.3.6.1

telnet-debugsource: before 1.2-150000.3.6.1

telnet-debuginfo: before 1.2-150000.3.6.1

telnet: before 1.2-150000.3.6.1

External links

http://www.suse.com/support/update/announcement/2022/suse-su-20223783-1/

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.