openSUSE 16 Security Update : amazon-ssm-agent (openSUSE-SU-2026:21884-1)

high Nessus Plugin ID 350145

Synopsis

The remote openSUSE host is missing one or more security updates.

Description

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21884-1 advisory.

- CVE-2026-56854,CVE-2026-56855,CVE-2026-78662: golang.org/x/crypto/ssh: authentication bypass and deadlocks in the crypto/ssh library (bsc#1278681).
- CVE-2026-71556: github.com/go-git/go-git/v5: arbitrary file read/write via symbolic link resolution (bsc#1276981).
- CVE-2026-71557: github.com/go-git/go-git/v5: malicious reference names may modify files outside the reference storage (bsc#1276994).

Changes for amazon-ssm-agent:

- Update to version 3.3.5390.0
* Bump github.com/gorilla/websocket from v1.4.2 to v1.5.3
* Bump golang.org/x/crypto from v0.53.0 to v0.56.0
* Bump golang.org/x/net from v0.56.0 to v0.57.0
* Bump golang.org/x/sys from v0.46.0 to v0.47.0
* Upgrade GoLang version from 1.25 to 1.26
* Mint control-channel token after dial to fix AZ-fault token expiry
* Resume patch documents interrupted by an external shutdown
* Use systemctl for systemd in aws: configureDocker on Amazon Linux
* Update greengrass component version to 1.3.5

- Update to version 3.3.5226.0
* Add bounds check for HeaderLength in AgentMessage Deserialize
* Bump github.com/go-git/go-git/v5 to v5.19.2
* Bump golang.org/x/sync to v0.21.0
* Detect Azure Linux and potential future unregistered Linux platforms
* Fix Windows session command parsing by removing shlex
* Fix shell injection in Windows domainjoin plugin parameters
* Prevent control channel deadlock on ProcessorBufferFull
* Revert migration from aws-sdk-go v1 to aws-sdk-go-v2 change
* Update the logic for loading RegistrationInfo
* Upgrade Go version to 1.25.13

- Update to version 3.3.5068.0

* Migrate from aws-sdk-go v1 to aws-sdk-go-v2
* Fix flaky registration/connection channel tests
* Sync AWS SDK fork in extra/ with multicloud vendor changes
* Harden function create file with permissions in a single syscall
* Upgrade Go version to 1.25.12
* Bump golang.org/x/[email protected] to golang.org/x/[email protected]
* Fix loopback bypass in remote-host port forwarding denylist

- Update to version 3.3.4851.0

* Add ECS/EKS credential endpoints and loopback to port-forward denylist
* Canonicalize IP addresses before port-forwarding denylist check
* Pass the ActiveDirectory domain password via stdin using -y /dev/stdin instead of the -w flag
* Fix false StuckAtInProgress timeout for associations with rate >= 2h
* Fix non-interactive session big file transfer issues
* Prevent ssm-user race condition with flock-based serialization
* Send AWS::EC2::Instance as source type when registered with provider EC2
* Validate process name in orphan worker detection

- Update to version 3.3.4793.0

* Add multicloud support enabling SSM Agent registration with Azure cloud providers
* Add support for the upcoming public key in the agent code

Tenable has extracted the preceding description block directly from the SUSE 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 amazon-ssm-agent package.

Plugin Details

Severity: High

ID: 350145

File Name: openSUSE-2026-21884-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 9/25/2026

Updated: 9/25/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.5

Percentile: 95.89

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-71556

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

CVSS Score Source: CVE-2026-78662

Vulnerability Information

CPE: cpe:/o:novell:opensuse:16.0, p-cpe:/a:novell:opensuse:amazon-ssm-agent

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 9/20/2026

Vulnerability Publication Date: 8/7/2026

Reference Information

CVE: CVE-2026-56854, CVE-2026-56855, CVE-2026-71556, CVE-2026-71557, CVE-2026-78662

Detections

Analytics