Secunia Logo
Netsikker nu! 2008
 
MIT Kerberos Telnet Client Buffer Overflow Vulnerabilities
Secunia Advisory: SA14745
Release Date: 2005-03-29
Last Update: 2005-04-04
Popularity: 17,903 views

Critical:
Moderately critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Kerberos 5.x

Subscribe: Instant alerts on relevant vulnerabilities

CVE reference:CVE-2005-0468
CVE-2005-0469


Description:
Gaël Delalleau has reported two vulnerabilities in Kerberos V5, which can be exploited by malicious people to compromise a vulnerable system.

1) A boundary error in the "slc_add_reply()" function in the included telnet client when handling LINEMODE suboptions can be exploited to cause buffer overflow via a specially crafted reply containing a large number of SLC (Set Local Character) commands.

2) A boundary error in the "env_opt_add()" function in the included telnet client when handling NEW-ENVIRON suboptions can be exploited to cause a heap-based buffer overflow via a specially crafted reply containing a large number of characters that need escaping.

Successful exploitation allows execution of arbitrary code, but requires that a user connects to a malicious server with the vulnerable telnet client.

The vulnerabilities affect versions up to and including release krb5-1.4.

Solution:
Apply patch:
http://web.mit.edu/kerberos/advisories/2005-001-patch_1.4.txt
http://web.mit.edu/kerberos/advisories/2005-001-patch_1.4.txt.asc

Provided and/or discovered by:
Gaël Delalleau

Changelog:
2005-03-30: Added link to US-CERT vulnerability note.
2005-04-04: Added link to US-CERT vulnerability note.

Original Advisory:
MIT:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2005-001-telnet.txt

iDEFENSE:
http://www.idefense.com/application/poi/display?id=220&type=vulnerabilities
http://www.idefense.com/application/poi/display?id=221&type=vulnerabilities

Other References:
US-CERT VU#291924:
http://www.kb.cert.org/vuls/id/291924

US-CERT VU#341908:
http://www.kb.cert.org/vuls/id/341908


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

Today
New advisories: 6
New vulnerabilities: 14
Updated advisories: 10

Less // 133 views
Debian update for openldap
Moderately // 115 views
Debian update for ruby1.9
Moderately // 120 views
Debian update for ruby1.8

10th Oct, 2008
New advisories: 15
New vulnerabilities: 83
Updated advisories: 39

Moderately // 833 views
Red Hat update for cups

Solutions | More...  


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. Apache Tomcat "RemoteFilterValve" Security Bypass Security Issue // 142 views
2. Debian update for openldap // 117 views
3. Debian update for ruby1.8 // 108 views
4. Debian update for ruby1.9 // 104 views
5. GuildFTPd "LIST" Processing Buffer Overflow Vulnerability // 81 views
6. Sun Java System Web Proxy Server FTP Subsystem Buffer Overflow // 44 views
7. CUPS Multiple Vulnerabilities // 42 views
8. Apple Mac OS X Security Update Fixes Multiple Vulnerabilities // 36 views
9. FUJITSU Interstage Products Apache Tomcat Security Bypass // 27 views
10. Trend Micro ServerProtect Multiple Buffer Overflow Vulnerabilities // 26 views