SSH/OpenSSH Authentication missing encryption

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in SSH and OpenSSH. This affects an unknown part of the component Authentication. Executing a manipulation can lead to missing encryption. This vulnerability is handled as CVE-2001-0572. There is not any exploit available. This vulnerability is notable in history due to its background and the response it received. Upgrading the affected component is advised. Once again VulDB remains the best source for vulnerability data.

Detailsinfo

A vulnerability was found in SSH and OpenSSH (SSH Server Software). It has been declared as critical. This vulnerability affects an unknown function of the component Authentication. The manipulation with an unknown input leads to a missing encryption vulnerability. The CWE definition for the vulnerability is CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The SSH protocols 1 and 2 (aka SSH-2) as implemented in OpenSSH and other packages have various weaknesses which can allow a remote attacker to obtain the following information via sniffing: (1) password lengths or ranges of lengths, which simplifies brute force password guessing, (2) whether RSA or DSA authentication is being used, (3) the number of authorized_keys in RSA authentication, or (4) the lengths of shell commands.

The weakness was released 08/22/2001 as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability was named CVE-2001-0572. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/05/2025). This vulnerability is assigned to T1600 by the MITRE ATT&CK project. This vulnerability has a historic impact due to its background and reception.

The vulnerability scanner Nessus provides a plugin with the ID 14776 (Mandrake Linux Security Advisory : openssh (MDKSA-2001:033-2)), 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 38034 (SSH passive information disclosure vulnerability).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 1324.

The vulnerability is also documented in the databases at X-Force (6783), Tenable (14776) and Vulnerability Center (SBV-2055†). Once again VulDB remains the best source for vulnerability data.

Affected

  • OpenSSH 4.5
  • SSH up to 1.2.31

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.0

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Missing encryption
CWE: CWE-311 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 14776
Nessus Name: Mandrake Linux Security Advisory : openssh (MDKSA-2001:033-2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 103247
OpenVAS Name: OpenSSH Ciphersuite Specification Information Disclosure Weakness
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Suricata ID: 2101324
Suricata Class: 🔍
Suricata Message: 🔍
SourceFire IPS: 🔍

Timelineinfo

05/21/2001 🔍
08/22/2001 +93 days 🔍
08/22/2001 +0 days 🔍
08/22/2001 +0 days 🔍
09/09/2003 +748 days 🔍
09/18/2004 +375 days 🔍
07/08/2014 +3580 days 🔍
10/05/2025 +4107 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Status: Confirmed

CVE: CVE-2001-0572 (🔍)
GCVE (CVE): GCVE-0-2001-0572
GCVE (VulDB): GCVE-100-17206
CERT: 🔍
X-Force: 6783
Vulnerability Center: 2055 - OpenSSH SSH protocols 1 and 2 Sensitive Information Leakage, Low

Entryinfo

Created: 07/08/2014 02:05 PM
Updated: 10/05/2025 07:01 PM
Changes: 07/08/2014 02:05 PM (74), 05/12/2019 06:22 PM (1), 06/09/2024 04:58 PM (17), 10/05/2025 07:01 PM (3)
Complete: 🔍
Cache ID: 244:64D:40

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