EulerOS 2.0 SP13 : kbd (EulerOS-SA-2026-4147)

high Nessus Plugin ID 364794

Synopsis

The remote EulerOS host is missing a security update.

Description

According to the versions of the kbd packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat('/proc/pid/fd/0')`. `stat()` on `/proc/pid/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path.(CVE-2026-72693)

Tenable has extracted the preceding description block directly from the EulerOS kbd security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected kbd packages.

Plugin Details

Severity: High

ID: 364794

File Name: EulerOS_SA-2026-4147.nasl

Version: 1.1

Type: Local

Family: Huawei Local Security Checks

Published: 10/12/2026

Updated: 10/12/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.16

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-72693

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:kbd-help, p-cpe:/a:huawei:euleros:kbd-legacy, p-cpe:/a:huawei:euleros:kbd-misc, p-cpe:/a:huawei:euleros:kbd

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/EulerOS/release, Host/EulerOS/rpm-list, Host/EulerOS/sp

Excluded KB Items: Host/EulerOS/uvp_version

Exploit Ease: No known exploits are available

Patch Publication Date: 10/10/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2026-72693

Detections

Analytics