Secunia Logo  


Secunia PSI WorldMap
 
OpenSSH Signal Handling Vulnerability and User Enumeration Weakness
Secunia Advisory: SA22173
Release Date: 2006-09-29
Last Update: 2007-11-08
Popularity: 19,383 views

Critical:
Highly critical
Impact: Exposure of system information
DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:OpenSSH 3.x
OpenSSH 4.x

Secunia CVSS-2 Score: Available in Secunia business solutions

Subscribe: Instant alerts on relevant vulnerabilities


Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
A vulnerability and a weakness have been reported in OpenSSH, which can be exploited by malicious people to disclose certain system information, cause a DoS (Denial of Service), and potentially compromise a vulnerable system.

1) A race condition exists within the signal handling. This can be exploited to crash the OpenSSH server and potentially allows the execution of arbitrary code.

The vulnerability is reported in version 4.3. Prior versions may also be affected.

2) An error in the processing of GSSAPI authentication requests can be exploited to determine if a username is valid.

The weakness is reported in versions prior to 4.4.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



Track this Secunia Advisory
Customers of the Secunia Vulnerability Intelligence solutions will automatically receive updates when new information regarding this advisory is released.

Read more about our Vulnerability Intelligence solutions and what they can do for you and your company.

About this Secunia Advisory
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
  
Latest Advisories

Send Feedback to Secunia
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.

Ideas, suggestions, and other feedback are most welcome.

Most Popular - 3 Hours

1. Microsoft DirectShow MPEG2TuneRequest ActiveX Control Buffer Overflow // 420 views
2. Internet Explorer Charset Inheritance Cross-Site Scripting Vulnerability // 66 views
3. Adobe Flash Player Multiple Vulnerabilities // 61 views
4. Adobe Reader/Acrobat Multiple Vulnerabilities // 46 views
5. Facebook Photo Uploader ActiveX Control Property Handling Buffer Overflow // 38 views
6. Google Chrome HTTP Response Buffer Overflow Vulnerability // 37 views
7. phpBB Cross Site Scripting and Unspecified Vulnerabilities // 32 views
8. Sun Java JDK / JRE Multiple Vulnerabilities // 28 views
9. Sun Java System Web Server Java Server Pages Content Disclosure // 25 views
10. CMME admin.php Cross-Site Scripting Vulnerability // 24 views