openSUSE 16 Security Update : putty (openSUSE-SU-2026:22127-1)

medium Nessus Plugin ID 370422

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-2026:22127-1 advisory.

Changes in putty:

- Update to release 0.85

* Fixed a remotely triggerable use-after-free in Pageant.
* Fixed a remotely triggerable buffer overflow if the OpenSSH encrypt-then-MAC cipher modes are in use. (Only used if a server supports nothing else.)
* Fixed a buffer overflow in private key decryption, if the private key is constructed maliciously. (Only triggerable on purpose if you let somebody else generate a key for you.)
* Denial-of-service security fixes for where a server could trigger a tight loop in PuTTY, and even a MITM can make it consume unlimited memory at startup.

- Fixed double free in RSA KEX error handling path can be triggered if the key sent by the server is unexpectedly short [boo#1266375, CVE-2026-48850]
- Fixed assertion failure in ECDSA signature verification can be triggered during initial key exchange via a crafted host key and signature [boo#1266373, CVE-2026-48852]
- Fixed TELNET session data is marked with trust sigils after authenticating to a proxy and allows for password prompt spoofing [boo#1266374, CVE-2026-48851]

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 putty package.

Plugin Details

Severity: Medium

ID: 370422

File Name: openSUSE-2026-22127-1.nasl

Version: 1.1

Type: Local

Agent: unix

Family: SuSE Local Security Checks

Published: 10/22/2026

Updated: 10/22/2026

Supported Sensors: Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.71

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2026-48850

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

CPE: cpe:/o:novell:opensuse:16.0, p-cpe:/a:novell:opensuse:putty

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/19/2026

Vulnerability Publication Date: 5/25/2026

Reference Information

CVE: CVE-2026-48850, CVE-2026-48851, CVE-2026-48852

Detections

Analytics