Package: libapache2-mod-auth-kerb
Version: 5.3-1
Severity: important

Hi,

It seems that libapache2-mod-auth-kerb is not fully thread-safe. It
crashes Apache processes when running with apache2-mpm-worker:

*** glibc detected *** double free or corruption (fasttop): 0xa9c0b298 ***
[Mon Aug 11 15:42:09 2008] [notice] child pid 26327 exit signal Aborted (6)
[Mon Aug 11 15:42:10 2008] [notice] child pid 26328 exit signal Segmentation 
fault (11)
*** glibc detected *** double free or corruption (fasttop): 0x084bddf8 ***
[Mon Aug 11 15:42:11 2008] [notice] child pid 31228 exit signal Aborted (6)
[Mon Aug 11 15:42:13 2008] [notice] child pid 31257 exit signal Segmentation 
fault (11)
[Mon Aug 11 15:42:14 2008] [notice] child pid 31258 exit signal Segmentation 
fault (11)
*** glibc detected *** free(): invalid pointer: 0xa9c012e8 ***

Steps to reproduce:

1. Login to an auth_kerb-protected page with username and password (not
   a Kerberos ticket).
2. Click the reload button fast a number of times in the browser.

I'm marking the bug as important as there might be security issues
here.

-- System Information:
Debian Release: 4.0
  APT prefers stable
  APT policy: (500, 'stable'), (200, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-6-686
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)

Versions of packages libapache2-mod-auth-kerb depends on:
ii  apa 2.2.3-4+etch5                        Next generation, scalable, extenda
ii  krb 1.16                                 Configuration files for Kerberos V
ii  lib 2.3.6.ds1-13etch7                    GNU C Library: Shared libraries
ii  lib 1.39+1.40-WIP-2006.11.14+dfsg-2etch1 common error description library
ii  lib 1.4.4-7etch6                         MIT Kerberos runtime libraries

libapache2-mod-auth-kerb recommends no packages.

-- no debconf information



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