OpenBSD OpenSSH 2.9.9 Key /.ssh/authorized_keys2 from 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 has been found in OpenBSD OpenSSH 2.9.9 and classified as critical. This vulnerability affects unknown code of the file /.ssh/authorized_keys2 of the component Key Handler. Performing a manipulation of the argument from results in privileges management. This vulnerability is cataloged as CVE-2001-1380. Furthermore, there is an exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as critical has been found in OpenBSD OpenSSH 2.9.9 (Connectivity Software). This affects an unknown part of the file /.ssh/authorized_keys2 of the component Key Handler. The manipulation of the argument from with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

OpenSSH before 2.9.9, while using keypairs and multiple keys of different types in the ~/.ssh/authorized_keys2 file, may not properly handle the "from" option associated with a key, which could allow remote attackers to login from unauthorized IP addresses.

The weakness was shared 09/26/2001 as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. This vulnerability is uniquely identified as CVE-2001-1380. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 13894 (Mandrake Linux Security Advisory : openssh (MDKSA-2001:081)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks and running in the context l. 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 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (7179), Tenable (13894), SecurityFocus (BID 3369†), OSVDB (642†) and Vulnerability Center (SBV-2734†). The entry VDB-17675 is related to this item. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 13894
Nessus Name: Mandrake Linux Security Advisory : openssh (MDKSA-2001:081)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: OpenSSH 2.9.9

Timelineinfo

09/26/2001 🔍
09/26/2001 +0 days 🔍
09/26/2001 +0 days 🔍
10/16/2001 +19 days 🔍
10/18/2001 +2 days 🔍
10/18/2001 +0 days 🔍
09/12/2002 +329 days 🔍
10/30/2003 +412 days 🔍
07/31/2004 +275 days 🔍
07/09/2014 +3630 days 🔍
12/26/2024 +3823 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: kb.cert.org
Status: Confirmed

CVE: CVE-2001-1380 (🔍)
GCVE (CVE): GCVE-0-2001-1380
GCVE (VulDB): GCVE-100-17559
CERT: 🔍
X-Force: 7179
SecurityFocus: 3369 - OpenSSH Key Based Source IP Access Control Bypass Vulnerability
OSVDB: 642 - OpenSSH Multiple Key Type ACL Bypass
Vulnerability Center: 2734 - OpenSSH before 2.9.9 Remote Login Weakness, Medium

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

Entryinfo

Created: 07/09/2014 22:38
Updated: 12/26/2024 05:40
Changes: 07/09/2014 22:38 (79), 05/16/2019 14:05 (3), 12/26/2024 05:40 (17)
Complete: 🔍
Cache ID: 216::103

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