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EulerOS 2.0 SP11 : openssh (EulerOS-SA-2026-3085)

medium Nessus Plugin ID 333389

Synopsis

The remote EulerOS host is missing multiple security updates.

Description

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

 OpenSSH before 10.3 can use unintended ECDSA algorithms. Listing of any ECDSA algorithm in PubkeyAcceptedAlgorithms or HostbasedAcceptedAlgorithms is misinterpreted to mean all ECDSA algorithms.(CVE-2026-35387)

 OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.(CVE-2026-35388)

 Vulnerability in the OpenSSH GSSAPI delta included in various Linux distributions. This vulnerability affects the GSSAPI patches added by various Linux distributions and does not affect the OpenSSH upstream project itself. The usage of sshpkt_disconnect() on an error, which does not terminate the process, allows an attacker to send an unexpected GSSAPI message type during the GSSAPI key exchange to the server, which will call the underlying function and continue the execution of the program without setting the related connection variables. As the variables are not initialized to NULL the code later accesses those uninitialized variables, accessing random memory, which could lead to undefined behavior. The recommended workaround is to use ssh_packet_disconnect() instead, which does terminate the process. The impact of the vulnerability depends heavily on the compiler flag hardening configuration.(CVE-2026-3497)

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

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

Solution

Update the affected openssh packages.

See Also

http://www.nessus.org/u?1a6a41cf

Plugin Details

Severity: Medium

ID: 333389

File Name: EulerOS_SA-2026-3085.nasl

Version: 1.1

Type: Local

Published: 8/8/2026

Updated: 8/8/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 94.27

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-35387

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS Score Source: CVE-2026-3497

Vulnerability Information

CPE: cpe:/o:huawei:euleros:2.0, p-cpe:/a:huawei:euleros:openssh-clients, p-cpe:/a:huawei:euleros:openssh-help, p-cpe:/a:huawei:euleros:openssh-server, p-cpe:/a:huawei:euleros:openssh, p-cpe:/a:huawei:euleros:pam_ssh_agent_auth

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: 8/7/2026

Vulnerability Publication Date: 3/12/2026

Reference Information

CVE: CVE-2026-3497, CVE-2026-35387, CVE-2026-35388

IAVA: 2026-A-0296