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Fedora Core Advisory: krb5

Jun 07, 2004, 01:31 (0 Talkback[s])
Fedora Update Notification
FEDORA-2004-149
2004-06-04

Product : Fedora Core 1
Name : krb5
Version : 1.3.3
Release : 6
Summary : The Kerberos network authentication system.

Description :
Kerberos V5 is a trusted-third-party network authentication system, which can improve your network's security by eliminating the insecure practice of cleartext passwords.


Update Information:

Bugs have been fixed in the krb5_aname_to_localname library function. Specifically, buffer overflows were possible for all Kerberos versions up to and including 1.3.3. The krb5_aname_to_localname function translates a Kerberos principal name to a local account name, typically a UNIX username. This function is frequently used when performing authorization checks.

If configured with mappings from particular Kerberos principals to particular UNIX user names, certain functions called by krb5_aname_to_localname will not properly check the lengths of buffers used to store portions of the principal name. If configured to map principals to user names using rules, krb5_aname_to_localname would consistently write one byte past the end of a buffer allocated from the heap. The Common Vulnerabilities and Exposures project (cve.mitre.org/) has assigned the name CAN-2004-0523 to this issue.

Only configurations which enable the explicit mapping or rules-based mapping functionality of krb5_aname_to_localname() are vulnerable. These configurations are not the default.


* Fri Jun 04 2004 Nalin Dahyabhai <nalin@redhat.com> 1.3.3-6
  • apply updated patch from MITKRB5-SA-2004-001 (revision 2004-06-02)
  • rebuild
  • apply patch from MITKRB5-SA-2004-001 (#125001)
  • removed rpath
  • re-enable large file support, fell out in 1.3-1
  • patch rcp to use long long and %lld format specifiers when reporting file sizes on large files
  • update to 1.3.3
  • update to 1.3.2
  • rebuild
  • rebuilt
  • rebuilt
  • catch krb4 send_to_kdc cases in kdc preference patch
  • remove patch to set TERM in klogind which, combined with the upstream fix= in 1.3.1, actually produces the bug now (#114762)
  • when iterating over lists of interfaces which are "up" from getifaddrs(), skip over those which have no address (#113347)
  • prefer the kdc which last replied to a request when sending requests to k= dcs
  • fix combination of --with-netlib and --enable-dns (#82176)
  • remove libdefault ticket_lifetime option from the default krb5.conf, it is ignored by libkrb5

This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/1/

9a19d200ff0a0d6e6c2029c9fd50653c SRPMS/krb5-1.3.3-6.src.rpm
e03f00a0916359f8a6005e3fc6b6995c i386/krb5-devel-1.3.3-6.i386.rpm
2d0973874755c7e313cfdf04f6860be7 i386/krb5-libs-1.3.3-6.i386.rpm
e4791f4e22a6bb8ab2a7f8fba96a882f i386/krb5-server-1.3.3-6.i386.rpm
720da2c10e2a30d65401425d430ab75d i386/krb5-workstation-1.3.3-6.i386.rpm
d52133ae2dd14a5ffb807236e8c46a46 i386/debug/krb5-debuginfo-1.3.3-6.i386.rpm
f7b3fd343d8831e217265f0355411f32 x86_64/krb5-devel-1.3.3-6.x86_64.rpm
8d9fa0425dae7bb5aad5642239380918 x86_64/krb5-libs-1.3.3-6.x86_64.rpm
5461eb73a8fe388b767670b71dd867c7 x86_64/krb5-server-1.3.3-6.x86_64.rpm
da2a35d9fa2ae594505b959b37abcab4 x86_64/krb5-workstation-1.3.3-6.x86_64.rpm
064b11d2fe16d6f845f850683afabbc4 x86_64/debug/krb5-debuginfo-1.3.3-6.x86_64.rpm
2d0973874755c7e313cfdf04f6860be7 x86_64/krb5-libs-1.3.3-6.i386.rpm

This update can also be installed with the Update Agent; you can launch the Update Agent with the 'up2date' command. =20



Fedora Update Notification
FEDORA-2004-150
2004-06-04

Product : Fedora Core 2
Name : krb5
Version : 1.3.3
Release : 7
Summary : The Kerberos network authentication system.

Description :
Kerberos V5 is a trusted-third-party network authentication system, which can improve your network's security by eliminating the insecure practice of cleartext passwords.


Update Information:

Bugs have been fixed in the krb5_aname_to_localname library function. Specifically, buffer overflows were possible for all Kerberos versions up to and including 1.3.3. The krb5_aname_to_localname function translates a Kerberos principal name to a local account name, typically a UNIX username. This function is frequently used when performing authorization checks.

If configured with mappings from particular Kerberos principals to particular UNIX user names, certain functions called by krb5_aname_to_localname will not properly check the lengths of buffers used to store portions of the principal name. If configured to map principals to user names using rules, krb5_aname_to_localname would consistently write one byte past the end of a buffer allocated from the heap. The Common Vulnerabilities and Exposures project (cve.mitre.org/) has assigned the name CAN-2004-0523 to this issue.

Only configurations which enable the explicit mapping or rules-based mapping functionality of krb5_aname_to_localname() are vulnerable. These configurations are not the default.


* Fri Jun 04 2004 Nalin Dahyabhai <nalin@redhat.com> 1.3.3-7
  • rebuild
  • apply updated patch from MITKRB5-SA-2004-001 (revision 2004-06-02)
  • rebuild
  • apply patch from MITKRB5-SA-2004-001 (#125001)
  • removed rpath
  • re-enable large file support, fell out in 1.3-1
  • patch rcp to use long long and %lld format specifiers when reporting file sizes on large files

This update can be downloaded from:
http://download.fedora.redhat.com/pub/fedora/linux/core/updates/2/

437540335f79da1cbbc18d164e6215c0 SRPMS/krb5-1.3.3-7.src.rpm
cd6c377ee71fc3ac7a2ed1451632bc99 i386/krb5-devel-1.3.3-7.i386.rpm
4a4a06a0dd0bddb0bf9aefc35825029c i386/krb5-libs-1.3.3-7.i386.rpm
f857845fde8315c8d6416e5d7befc605 i386/krb5-server-1.3.3-7.i386.rpm
84cc98e232f3834450b450d44dd9374a i386/krb5-workstation-1.3.3-7.i386.rpm
1ee42664e020e7fa5a4a1c8202aabdee i386/debug/krb5-debuginfo-1.3.3-7.i386.rpm
6dbdb3334974c1735a044deb2632e3a6 x86_64/krb5-devel-1.3.3-7.x86_64.rpm
864422b001ad11e0468ed53cbe6276fe x86_64/krb5-libs-1.3.3-7.x86_64.rpm
606c96ce4814f686a99d7231aa5a6080 x86_64/krb5-server-1.3.3-7.x86_64.rpm
ad1573302d8702c705608d5f2803362d x86_64/krb5-workstation-1.3.3-7.x86_64.rpm
6409ec2efcf54640e58451b32efb270a x86_64/debug/krb5-debuginfo-1.3.3-7.x86_64.rpm
4a4a06a0dd0bddb0bf9aefc35825029c x86_64/krb5-libs-1.3.3-7.i386.rpm

This update can also be installed with the Update Agent; you can launch the Update Agent with the 'up2date' command.