Fedora 9: 2009-2834 Critical: Krb5 Buffer Overflow and Pointer Flaws

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.

This update incorporates patches to fix potential read overflow and NULL pointer

dereferences in the implementation of the SPNEGO GSSAPI mechanism

(CVE-2009-0844, CVE-2009-0845), attempts to free an uninitialized pointer during

protocol parsing (CVE-2009-0846), and a bug in length validation during protocol

parsing (CVE-2009-0847).

* Tue Apr 7 2009 Nalin Dahyabhai 1.6.3-16

- add patches for read overflow and null pointer dereference in the

implementation of the SPNEGO mechanism (CVE-2009-0844, CVE-2009-0845)

- add patch for attempt to free uninitialized pointer in libkrb5

(CVE-2009-0846)

- add patch to fix length validation bug in libkrb5 (CVE-2009-0847)

* Mon Apr 6 2009 Nalin Dahyabhai

- pull in a couple of defuzzed patches from the F-10 version of this package,

dropping a redundant man page patch in the process

* Tue Mar 17 2009 Nalin Dahyabhai 1.6.3-15

- libgssapi_krb5: backport fix for some errors which can occur when

we fail to set up the server half of a context (CVE-2009-0845)

* Sat Jun 14 2008 Tom "spot" Callaway 1.6.3-14

- generate src/include/krb5/krb5.h before building

- fix conditional for sparcv9

* Wed Apr 16 2008 Nalin Dahyabhai 1.6.3-13

- ftp: use the correct local filename during mget when the 'case' option is

enabled (#442713)

* Fri Apr 4 2008 Nalin Dahyabhai 1.6.3-12

- stop exporting kadmin keys to a keytab file when kadmind starts -- the

daemon's been able to use the database directly for a long long time now

- belatedly add aes128,aes256 to the default set of supported key types

* Tue Apr 1 2008 Nalin Dahyabhai 1.6.3-11

- libgssapi_krb5: properly export the acceptor subkey when creating a lucid

context (Kevin Coffman, via the nfs4 mailing list)

[ 1 ] Bug #490634 - CVE-2009-0845 krb5: Null pointer dereference in GSSAPI SPNEGO security mechanism

https://bugzilla.redhat.com/show_bug.cgi?id=490634

[ 2 ] Bug #491033 - CVE-2009-0844 krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-2009-001)

https://bugzilla.redhat.com/show_bug.cgi?id=491033

[ 3 ] Bug #491036 - CVE-2009-0846 krb5: ASN.1 decoder can free uninitialized pointer when decoding an invalid encoding (MITKRB5-SA-2009-002)

https://bugzilla.redhat.com/show_bug.cgi?id=491036

[ 4 ] Bug #491034 - CVE-2009-0847 krb5: incorrect length check inside ASN.1 decoder (MITKRB5-SA-2009-001)

https://bugzilla.redhat.com/show_bug.cgi?id=491034

su -c 'yum update krb5' at the command line.

For more information, refer to "Managing Software with yum",

available at .

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