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Secunia Advisory SA47348

Kerberos telnetd Buffer Overflow Vulnerability
Secunia Advisory SA47348
Secunia VIM 4.0 - Free Trial
Release Date 2011-12-27
   
Popularity 2,278 views
Comments 0 comments

Criticality level Highly criticalHighly critical
Impact System access
Where From remote
Authentication level This information is available to Secunia VIM customers
   
Report reliability This information is available to Secunia VIM customers
Solution Status Vendor Workaround
   
Systems affected This information is available to Secunia VIM customers
Approve distribution This information is available to Secunia VIM customers
   
Software:
Kerberos 5.x

Secunia CVSS Score This information is available to Secunia VIM Customers
CVE Reference(s) CVE-2011-4862 CVSS score available to Secunia VIM customers
  

Description

A vulnerability has been reported in Kerberos, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the "encrypt_keyid()" function (libtelnet/encrypt.c), which can be exploited to cause a buffer overflow by sending specially crafted commands to the server.

This is related to:
SA47397

The vulnerability is reported in krb5 versions prior to 1.8 and all versions of krb5-appl.


Solution
Update to krb5 version 1.8. Apply patch for krb5-appl.

Provided and/or discovered by
Reported by the vendor.

Original Advisory
MITKRB5-SA-2011-008:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt

Other references
Further details available to Secunia VIM customers

Deep Links
Links available to Secunia VIM customers


Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Kerberos telnetd Buffer Overflow Vulnerability
 
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