OpenBSD OpenSSH up to 10.0 ssh invalid special elements

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in OpenBSD OpenSSH up to 10.0. Affected by this issue is some unknown functionality of the component ssh. The manipulation results in improper handling of invalid use of special elements. This vulnerability is identified as CVE-2025-61984. The attack is only possible with local access. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, was found in OpenBSD OpenSSH up to 10.0. Affected is an unknown function of the component ssh. The manipulation with an unknown input leads to a improper handling of invalid use of special elements vulnerability. CWE is classifying the issue as CWE-159. The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)

The advisory is available at openwall.com. This vulnerability is traded as CVE-2025-61984 since 10/06/2025. The exploitability is told to be difficult. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/10/2026).

The vulnerability scanner Nessus provides a plugin with the ID 269984 (OpenSSH < 10.1 / 10.1p1 RCE), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 10.1 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (269984) and CERT Bund (WID-SEC-2025-2212). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • IBM VIOS
  • IBM AIX
  • Red Hat Enterprise Linux
  • Fedora Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source OpenSSH
  • Meinberg LANTIME

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.1
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.6
CNA Vector (MITRE): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper handling of invalid use of special elements
CWE: CWE-159 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 269984
Nessus Name: OpenSSH < 10.1 / 10.1p1 RCE

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OpenSSH 10.1

Timelineinfo

10/06/2025 Advisory disclosed
10/06/2025 +0 days CVE reserved
10/06/2025 +0 days VulDB entry created
01/10/2026 +96 days VulDB entry last update

Sourcesinfo

Vendor: openbsd.org

Advisory: openwall.com
Status: Confirmed

CVE: CVE-2025-61984 (🔒)
GCVE (CVE): GCVE-0-2025-61984
GCVE (VulDB): GCVE-100-327306
CERT Bund: WID-SEC-2025-2212 - OpenSSH: Mehrere Schwachstellen erm&ouml;glichen Codeausf&uuml;hrung

Entryinfo

Created: 10/06/2025 21:26
Updated: 01/10/2026 02:34
Changes: 10/06/2025 21:26 (64), 10/07/2025 19:53 (7), 10/11/2025 01:32 (2), 12/20/2025 18:51 (1), 01/07/2026 08:42 (1), 01/10/2026 02:34 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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