SB2021060915 - Arch Linux update for inetutils

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2019-0053)

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

The vulnerability exists due to insufficient validation of environment variables when connecting via the telnet client to remote telnet servers. A local authenticated attacker can trigger stack-based buffer overflow, bypass veriexec restrictions and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

This vulnerability only affects the telnet client - accessible from the CLI or shel.

2) Buffer overflow (CVE-ID: CVE-2020-10188)

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.

Remediation

Install update from vendor's website.

References

• https://security.archlinux.org/advisory/ASA-202106-20