openEuler 20.03 LTS update for telnet-0.17-76

1) Buffer overflow

EUVDB-ID: #VU26625

Risk: High

CVSSv4.0: 8.1 [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:Amber]

CVE-ID: CVE-2020-10188

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary involving the netclear and nextitem functions within the utility.c in telnetd daemon from netkit telnet. A remote attacker can end specially crafted data to the telnetd daemon, trigger a boundary error and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

telnet-help: before 0.17-76

telnet-debugsource: before 0.17-76

telnet-debuginfo: before 0.17-76

telnet: before 0.17-76

CPE2.3

• cpe:2.3:o:openeuler:openeuler:20.03:LTS:*:*:*:*:*:*
• cpe:2.3:a:openeuler:telnet-help:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:telnet-debugsource:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:telnet-debuginfo:*:*:*:*:*:openeuler:*:*
• cpe:2.3:a:openeuler:telnet:*:*:*:*:*:openeuler:*:*

External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1017

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.