RT RT/krbdev.mit.edu: Ticket #8341 Verify decoded kadmin C strings [CVE-2015-8629] Signed in as guest.
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 The Basics  
Id
8341
Status
resolved
Worked
0 min
Priority
0/0
Queue
krb5
 

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Tags
Version_reported
Version_Fixed
  • 1.14.1
  • 1.13.4
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  • 1.14-next
  • 1.13-next
 

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 Dates  
Created: Wed Jan 27 15:59:25 2016
Starts: Not set
Started: Wed Jan 27 15:59:25 2016
Last Contact: Mon Feb 8 18:38:08 2016
Due: Not set
Updated: Mon Feb 8 18:38:08 2016 by tlyu
 

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 ghudson
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 ghudson@mit.edu
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History   Display mode: [Brief headers] [Full headers]
      Wed Jan 27 15:59:25 2016  ghudson - Ticket created    
     
From: ghudson@mit.edu
Subject: git commit


Verify decoded kadmin C strings [CVE-2015-8629]

In xdr_nullstring(), check that the decoded string is terminated with
a zero byte and does not contain any internal zero bytes.

CVE-2015-8629:

In all versions of MIT krb5, an authenticated attacker can cause
kadmind to read beyond the end of allocated memory by sending a string
without a terminating zero byte.  Information leakage may be possible
for an attacker with permission to modify the database.

    CVSSv2 Vector: AV:N/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:OF/RC:C

https://github.com/krb5/krb5/commit/df17a1224a3406f57477bcd372c61e04c0e5a5bb
Author: Greg Hudson <ghudson@mit.edu>
Commit: df17a1224a3406f57477bcd372c61e04c0e5a5bb
Branch: master
 src/lib/kadm5/kadm_rpc_xdr.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)


Download (untitled) 798b
      Wed Jan 27 15:59:25 2016  ghudson - Requestor ghudson@mit.edu added    
      Wed Jan 27 15:59:25 2016  ghudson - Status changed from new to review    
      Wed Jan 27 15:59:26 2016  ghudson - Tags pullup added    
      Wed Jan 27 15:59:26 2016  ghudson - Target_Version 1.13-next added    
      Wed Jan 27 16:00:28 2016  ghudson - Target_Version 1.14-next added    
      Mon Feb  8 17:44:22 2016  tlyu - Version_Fixed 1.14.1 added    
      Mon Feb  8 17:44:22 2016  tlyu - Correspondence added    
     
From: tlyu@mit.edu
Subject: git commit


Verify decoded kadmin C strings [CVE-2015-8629]

In xdr_nullstring(), check that the decoded string is terminated with
a zero byte and does not contain any internal zero bytes.

CVE-2015-8629:

In all versions of MIT krb5, an authenticated attacker can cause
kadmind to read beyond the end of allocated memory by sending a string
without a terminating zero byte.  Information leakage may be possible
for an attacker with permission to modify the database.

    CVSSv2 Vector: AV:N/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:OF/RC:C

(cherry picked from commit df17a1224a3406f57477bcd372c61e04c0e5a5bb)

https://github.com/krb5/krb5/commit/54a9a01c6a923d604cd06f321b8381ebc5cb42d8
Author: Greg Hudson <ghudson@mit.edu>
Committer: Tom Yu <tlyu@mit.edu>
Commit: 54a9a01c6a923d604cd06f321b8381ebc5cb42d8
Branch: krb5-1.14
 src/lib/kadm5/kadm_rpc_xdr.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)


Download (untitled) 904b
      Mon Feb  8 18:38:08 2016  tlyu - Status changed from review to resolved    
      Mon Feb  8 18:38:08 2016  tlyu - Version_Fixed 1.13.4 added    
      Mon Feb  8 18:38:08 2016  tlyu - Keyword pullup deleted    
      Mon Feb  8 18:38:08 2016  tlyu - Correspondence added    
     
From: tlyu@mit.edu
Subject: git commit


Verify decoded kadmin C strings [CVE-2015-8629]

In xdr_nullstring(), check that the decoded string is terminated with
a zero byte and does not contain any internal zero bytes.

CVE-2015-8629:

In all versions of MIT krb5, an authenticated attacker can cause
kadmind to read beyond the end of allocated memory by sending a string
without a terminating zero byte.  Information leakage may be possible
for an attacker with permission to modify the database.

    CVSSv2 Vector: AV:N/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:OF/RC:C

(cherry picked from commit df17a1224a3406f57477bcd372c61e04c0e5a5bb)

https://github.com/krb5/krb5/commit/6e84bedf362f1d7f36d850774bbac6f3dee21ecd
Author: Greg Hudson <ghudson@mit.edu>
Committer: Tom Yu <tlyu@mit.edu>
Commit: 6e84bedf362f1d7f36d850774bbac6f3dee21ecd
Branch: krb5-1.13
 src/lib/kadm5/kadm_rpc_xdr.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)


Download (untitled) 904b