OpenBSD OpenSSH 1.2.2/1.2.3/2.1/2.1.1 CRC32 integer coercion

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.0$0-$5k0.00

A vulnerability was found in OpenBSD OpenSSH 1.2.2/1.2.3/2.1/2.1.1 (Connectivity Software) and classified as critical. This issue affects some unknown processing of the component CRC32 Handler. The manipulation with an unknown input leads to a integer coercion vulnerability. Using CWE to declare the problem leads to CWE-192. Integer coercion refers to a set of flaws pertaining to the type casting, extension, or truncation of primitive data types. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

CORE SDI SSH1 CRC-32 compensation attack detector allows remote attackers to execute arbitrary commands on an SSH server or client via an integer overflow.

The weakness was disclosed 03/12/2001 by Michal Zalewski with BindView as confirmed advisory (CERT.org). It is possible to read the advisory at cert.org. The identification of this vulnerability is CVE-2001-0144. 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 a public exploit is available.

The exploit is available at securityfocus.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 14923 (Debian DSA-086-1 : ssh-nonfree - remote root exploit), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l.

Upgrading eliminates this vulnerability. A possible mitigation has been published 9 months after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 1324. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 279.

The vulnerability is also documented in the databases at X-Force (6083), Exploit-DB (349), Tenable (14923), SecurityFocus (BID 2347†) and OSVDB (503†). The entries VDB-20246 and VDB-81895 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

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

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer coercion
CWE: CWE-192 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

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

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Nessus ID: 14923
Nessus Name: Debian DSA-086-1 : ssh-nonfree - remote root exploit
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Snort ID: 1324
Snort Message: INDICATOR-SHELLCODE ssh CRC32 overflow /bin/sh
Snort Class: 🔍

Suricata ID: 2101324
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

02/08/2001 🔍
03/12/2001 +32 days 🔍
03/12/2001 +0 days 🔍
03/12/2001 +0 days 🔍
11/13/2001 +246 days 🔍
12/09/2002 +391 days 🔍
09/29/2004 +660 days 🔍
07/03/2014 +3564 days 🔍
12/25/2024 +3828 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: cert.org
Researcher: Michal Zalewski
Organization: BindView
Status: Confirmed

CVE: CVE-2001-0144 (🔍)
GCVE (CVE): GCVE-0-2001-0144
GCVE (VulDB): GCVE-100-16547

OVAL: 🔍

X-Force: 6083
SecurityFocus: 2347 - SSH CRC-32 Compensation Attack Detector Vulnerability
OSVDB: 503
Vulnerability Center: 314 - SSH CRC32 Compensation Attack Detector Allows Arbitrary Code Execution, Critical

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

Entryinfo

Created: 07/03/2014 03:56 PM
Updated: 12/25/2024 11:08 AM
Changes: 07/03/2014 03:56 PM (83), 05/06/2019 09:36 AM (8), 12/25/2024 11:08 AM (17)
Complete: 🔍
Cache ID: 18:517:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Might our Artificial Intelligence support you?

Check our Alexa App!