Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
[ GLSA 200406-21 ] mit-krb5: Multiple buffer overflows in krb5_aname_to_localname
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index News & Announcements
View previous topic :: View next topic  
Author Message
GLSA
Bodhisattva
Bodhisattva


Joined: 25 Feb 2003
Posts: 3827
Location: Essen, Germany

PostPosted: Tue Jun 29, 2004 6:21 pm    Post subject: [ GLSA 200406-21 ] mit-krb5: Multiple buffer overflows in kr Reply with quote

Gentoo Linux Security Advisory

Title: mit-krb5: Multiple buffer overflows in krb5_aname_to_localname (GLSA 200406-21)
Severity: high
Exploitable: remote
Date: June 29, 2004
Bug(s): #52744
ID: 200406-21

Synopsis


mit-krb5 contains multiple buffer overflows in the function
krb5_aname_to_localname(). This could potentially lead to a complete remote
system compromise.


Background


mit-krb5 is the free implementation of the Kerberos network authentication
protocol by the Massachusetts Institute of Technology.


Affected Packages

Package: app-crypt/mit-krb5
Vulnerable: <= 1.3.3
Unaffected: >= 1.3.3-r1
Architectures: All supported architectures


Description


The library function krb5_aname_to_localname() contains multiple buffer
overflows. This is only exploitable if explicit mapping or rules-based
mapping is enabled. These are not enabled as default.

With explicit mapping enabled, an attacker must authenticate using a
principal name listed in the explicit mapping list.

With rules-based mapping enabled, an attacker must first be able to create
arbitrary principal names either in the local realm Kerberos realm or in a
remote realm from which the local realm's service are reachable by
cross-realm authentication.


Impact


An attacker could use these vulnerabilities to execute arbitrary code with
the permissions of the user running mit-krb5, which could be the root user.


Workaround


There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.


Resolution


mit-krb5 users should upgrade to the latest version:
Code:
# emerge sync

    # emerge -pv ">=app-crypt/mit-krb5-1.3.3-r1"
    # emerge ">=app-crypt/mit-krb5-1.3.3-r1"


References

CAN-2004-0523
MIT krb5 Security Advisory


Last edited by GLSA on Fri Sep 26, 2014 4:16 am; edited 3 times in total
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index News & Announcements All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum