OpenBSD OpenSSH up to 1.233 Default Configuration loginracetime/maxstartup denial of service

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenBSD OpenSSH up to 1.233. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component Default Configuration. Performing a manipulation of the argument loginracetime/maxstartup results in denial of service. This vulnerability was named CVE-2010-5107. In addition, an exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in OpenBSD OpenSSH up to 1.233 (Connectivity Software). This affects an unknown function of the component Default Configuration. The manipulation of the argument loginracetime/maxstartup with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

The default configuration of OpenSSH through 6.1 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.

The weakness was presented 02/06/2013 by Nico Golde as not defined mailinglist post (Website). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2010-5107 since 04/30/2012. 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 private exploit are known.

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 71007 (RHEL 6 : openssh (RHSA-2013:1591)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 42413 (OpenSSH LoginGraceTime Denial of Service Vulnerability).

Upgrading to version 1.234 eliminates this vulnerability. The upgrade is hosted for download at openbsd.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at openbsd.org. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 11 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (71007), SecurityFocus (BID 58162†), OSVDB (90007†) and Secunia (SA54572†). See VDB-68771 for similar entry. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71007
Nessus Name: RHEL 6 : openssh (RHSA-2013:1591)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 865397
OpenVAS Name: Fedora Update for openssh FEDORA-2013-2206
OpenVAS File: 🔍
OpenVAS Family: 🔍

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 1.234
Patch: openbsd.org

Timelineinfo

04/30/2012 🔍
02/06/2013 +282 days 🔍
02/06/2013 +0 days 🔍
02/09/2013 +3 days 🔍
02/11/2013 +2 days 🔍
03/07/2013 +24 days 🔍
08/30/2013 +176 days 🔍
11/21/2013 +83 days 🔍
11/21/2013 +0 days 🔍
04/24/2019 +1980 days 🔍

Sourcesinfo

Vendor: openbsd.org

Advisory: openwall.com
Researcher: Nico Golde
Status: Not defined
Confirmation: 🔍

CVE: CVE-2010-5107 (🔍)
GCVE (CVE): GCVE-0-2010-5107
GCVE (VulDB): GCVE-100-7623

OVAL: 🔍

SecurityFocus: 58162 - OpenSSH CVE-2010-5107 Denial of Service Vulnerability
Secunia: 54572 - Xerox FreeFlow Print Server Multiple Vulnerabilities, Highly Critical
OSVDB: 90007

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

Entryinfo

Created: 02/11/2013 15:48
Updated: 04/24/2019 12:34
Changes: 02/11/2013 15:48 (86), 04/24/2019 12:34 (1)
Complete: 🔍
Committer: olku
Cache ID: 216:826:103

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