OpenSSH up to 7.3 Forwarded Agent Channel untrusted search path

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in OpenSSH up to 7.3. The impacted element is an unknown function of the component Forwarded Agent Channel Handler. The manipulation leads to untrusted search path. This vulnerability is uniquely identified as CVE-2016-10009. The attack is possible to be carried out remotely. Moreover, an exploit is present. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSSH up to 7.3 (Connectivity Software). It has been rated as critical. This issue affects some unknown functionality of the component Forwarded Agent Channel Handler. The manipulation with an unknown input leads to a untrusted search path vulnerability. Using CWE to declare the problem leads to CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4 allows remote attackers to execute arbitrary local PKCS#11 modules by leveraging control over a forwarded agent-socket.

The bug was discovered 12/19/2016. The weakness was disclosed 12/19/2016 by Jann Horn as release-7.4 as confirmed release notes (Website). It is possible to read the advisory at openssh.com. The public release has been coordinated in cooperation with the project team. The identification of this vulnerability is CVE-2016-10009 since 12/19/2016. The attack may be initiated remotely. A simple authentication is required for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1574 according to MITRE ATT&CK.

A public exploit has been developed by Google Security Research and been published 4 days after the advisory. The exploit is available at exploit-db.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 96411 (FreeBSD : FreeBSD -- OpenSSH multiple vulnerabilities (2c948527-d823-11e6-9171-14dae9d210b8)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197025 (Ubuntu Security Notification for Openssh Vulnerabilities (USN-3538-1)).

Upgrading to version 7.4 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (40963), Tenable (96411), SecurityFocus (BID 94968†), SecurityTracker (ID 1037490†) and CERT Bund (WID-SEC-2023-1996). seclists.org is providing further details. The entries VDB-94608, VDB-94609, VDB-94610 and VDB-94611 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • FreeBSD

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.8

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.3
NVD Vector: 🔍

ADP CISA Base Score: 7.3
ADP CISA Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Untrusted search path
CWE: CWE-426
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Google Security Research
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96411
Nessus Name: FreeBSD : FreeBSD -- OpenSSH multiple vulnerabilities (2c948527-d823-11e6-9171-14dae9d210b8)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 801105
OpenVAS Name: Apple Mac OS X Multiple Vulnerabilities-HT207615
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Upgrade: OpenSSH 7.4
Patch: github.com

Timelineinfo

12/19/2016 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/19/2016 +0 days 🔍
12/20/2016 +1 days 🔍
12/23/2016 +3 days 🔍
12/23/2016 +0 days 🔍
01/04/2017 +12 days 🔍
01/12/2017 +8 days 🔍
05/30/2026 +3424 days 🔍

Sourcesinfo

Advisory: release-7.4
Researcher: Jann Horn
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-10009 (🔍)
GCVE (CVE): GCVE-0-2016-10009
GCVE (VulDB): GCVE-100-94607

OVAL: 🔍

SecurityFocus: 94968 - OpenSSH CVE-2016-10009 Remote Code Execution Vulnerability
SecurityTracker: 1037490
CERT Bund: WID-SEC-2023-1996 - OpenSSH: Mehrere Schwachstellen

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 12/20/2016 10:26
Updated: 05/30/2026 01:39
Changes: 12/20/2016 10:26 (87), 08/03/2019 09:18 (11), 10/12/2022 11:12 (3), 12/07/2024 01:14 (14), 01/09/2026 15:12 (7), 05/30/2026 01:39 (12)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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