OpenBSD OpenSSH 2.9.9p2 Authentication information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in OpenBSD OpenSSH 2.9.9p2. This affects an unknown function of the component Authentication. This manipulation causes information disclosure. This vulnerability appears as CVE-2001-1382. In addition, an exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in OpenBSD OpenSSH 2.9.9p2 (Connectivity Software). Affected by this vulnerability is some unknown processing of the component Authentication. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

The "echo simulation" traffic analysis countermeasure in OpenSSH before 2.9.9p2 sends an additional echo packet after the password and carriage return is entered, which could allow remote attackers to determine that the countermeasure is being used.

The bug was discovered 09/27/2001. The weakness was presented 09/27/2001 by Yang Yu (Website). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2001-1382. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but an exploit is available. The attack technique deployed by this issue is T1592 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 44070 (OpenSSH < 2.9.9p2 echo simulation Information Disclosure), 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 42410 (OpenSSH "echo simulation" Information Disclosure Vulnerability).

Upgrading to version 2.9.9p2 eliminates this vulnerability. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (9803), Tenable (44070), OSVDB (5408†) and Vulnerability Center (SBV-12955†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / 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: 44070
Nessus Name: OpenSSH < 2.9.9p2 echo simulation Information Disclosure
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: OpenSSH 2.9.9p2

Timelineinfo

09/27/2001 🔍
09/27/2001 +0 days 🔍
09/27/2001 +0 days 🔍
09/27/2001 +0 days 🔍
09/27/2001 +0 days 🔍
09/28/2001 +1 days 🔍
04/09/2004 +923 days 🔍
10/22/2006 +926 days 🔍
10/04/2011 +1808 days 🔍
07/09/2014 +1009 days 🔍
09/25/2025 +4096 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: openwall.com
Researcher: Yang Yu
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2001-1382 (🔍)
GCVE (CVE): GCVE-0-2001-1382
GCVE (VulDB): GCVE-100-17443
X-Force: 9803
OSVDB: 5408 - OpenSSH echo simulation Information Disclosure
Vulnerability Center: 12955 - OpenSSH Use of \, Medium

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

Entryinfo

Created: 07/09/2014 15:07
Updated: 09/25/2025 16:51
Changes: 07/09/2014 15:07 (72), 07/10/2019 08:09 (2), 09/25/2025 16:51 (20)
Complete: 🔍
Cache ID: 216::103

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