OpenBSD OpenSSH up to 3.0.1 Channel Code numeric error

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in OpenBSD OpenSSH up to 3.0.1. This affects an unknown part of the component Channel Code Handler. The manipulation results in numeric error. This vulnerability is identified as CVE-2002-0083. Additionally, an exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, was found in OpenBSD OpenSSH up to 3.0.1 (Connectivity Software). Affected is an unknown function of the component Channel Code Handler. The manipulation with an unknown input leads to a numeric error vulnerability. CWE is classifying the issue as CWE-189. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Off-by-one error in the channel code of OpenSSH 2.0 through 3.0.2 allows local users or remote malicious servers to gain privileges.

The weakness was released 03/07/2002 by Joost Pol (Website). The advisory is shared for download at linuxsecurity.com. This vulnerability is traded as CVE-2002-0083. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 14956 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38088 (OpenSSH Channel Code Off-By-One Vulnerability).

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (8383), Exploit-DB (21314), Tenable (14956), SecurityFocus (BID 4241†) and OSVDB (730†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14956
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 10883
OpenVAS Name: OpenSSH Channel Code Off by 1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
McAfee IPS: 🔍
McAfee IPS Version: 🔍

Timelineinfo

03/07/2002 🔍
03/07/2002 +0 days 🔍
03/15/2002 +8 days 🔍
03/15/2002 +0 days 🔍
09/12/2002 +181 days 🔍
12/12/2002 +90 days 🔍
07/11/2014 +4229 days 🔍
09/23/2025 +4092 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: linuxsecurity.com
Researcher: Joost Pol
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2002-0083 (🔍)
GCVE (CVE): GCVE-0-2002-0083
GCVE (VulDB): GCVE-100-17976
X-Force: 8383
SecurityFocus: 4241 - OpenSSH Channel Code Off-By-One Vulnerability
OSVDB: 730 - OpenSSH Channel Code Off by One Remote Privilege Escalation
Vulnerability Center: 374 - OpenSSH Channel Code Off-By-One Error Allows Privilege Elevation, Critical

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

Entryinfo

Created: 07/11/2014 13:41
Updated: 09/23/2025 02:00
Changes: 07/11/2014 13:41 (68), 05/06/2019 16:13 (6), 06/27/2021 09:33 (2), 03/25/2025 00:02 (18), 09/23/2025 02:00 (2)
Complete: 🔍
Cache ID: 216::103

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