OpenBSD OpenSSH 2.9.9 SFTP Server privileges management

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD OpenSSH 2.9.9. It has been rated as critical. This impacts an unknown function of the component SFTP Server. The manipulation leads to privileges management. This vulnerability is referenced as CVE-2001-0816. Furthermore, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in OpenBSD OpenSSH 2.9.9 (Connectivity Software). It has been rated as critical. This issue affects an unknown function of the component SFTP Server. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

OpenSSH before 2.9.9, when running sftp using sftp-server and using restricted keypairs, allows remote authenticated users to bypass authorized_keys2 command= restrictions using sftp commands.

The weakness was published 09/18/2001 by Peter Watkins as not defined posting (Bugtraq). It is possible to read the advisory at archives.neohapsis.com. The identification of this vulnerability is CVE-2001-0816. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but an exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. The exploit is available at archives.neohapsis.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 10771 (OpenSSH 2.5.x - 2.9 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38069 (OpenSSH Key-Based Source IP Access Control Bypass Vulnerability).

Upgrading to version 2.9.9 eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (7634), Tenable (10771), SecurityFocus (BID 3345†), OSVDB (5536†) and Vulnerability Center (SBV-1871†). Similar entry is available at VDB-17559. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 10771
Nessus Name: OpenSSH 2.5.x - 2.9 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Upgrade: OpenSSH 2.9.9

Timelineinfo

09/18/2001 🔍
09/18/2001 +0 days 🔍
09/18/2001 +0 days 🔍
09/26/2001 +7 days 🔍
09/28/2001 +2 days 🔍
12/06/2001 +69 days 🔍
12/06/2001 +0 days 🔍
09/01/2003 +634 days 🔍
04/09/2004 +220 days 🔍
07/10/2014 +3744 days 🔍
05/12/2019 +1767 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: archives.neohapsis.com
Researcher: Peter Watkins
Status: Not defined

CVE: CVE-2001-0816 (🔍)
GCVE (CVE): GCVE-0-2001-0816
GCVE (VulDB): GCVE-100-17675
X-Force: 7634
SecurityFocus: 3345 - OpenSSH SFTP Command Restriction Bypassing Vulnerability
OSVDB: 5536 - OpenSSH sftp-server Restricted Keypair Restriction Bypass
Vulnerability Center: 1871 - OpenSSH Key Based Source IP Access Control Bypass, Medium

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

Entryinfo

Created: 07/10/2014 17:11
Updated: 05/12/2019 09:33
Changes: 07/10/2014 17:11 (77), 05/12/2019 09:33 (3)
Complete: 🔍
Cache ID: 216::103

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