Crash when authenticating

I'm seeing the following crash during authentication:

glibc detected *** /usr/java/jdk1.6.0_25/bin/java: free(): invalid pointer: 0x0000000041e33450 ***
======= Backtrace: =========
/lib64/libc.so.60x3b66275916
/opt/quest/lib64/libvas.so.4(vas_string_zerofree+0x4b)0x7ffd9cc615f0
/lib64/security/pam_vas3.so(pam_vas_do_conversation+0x210)0x7ffd9ce01c7d
/lib64/security/pam_vas3.so(pam_vas_am_prompt_for_cred+0x2ff)0x7ffd9cdfc85b
/lib64/security/pam_vas3.so(pam_sm_authenticate+0xb30)0x7ffd9cdf772a
/lib64/libpam.so.00x3b69202cee
/lib64/libpam.so.0(pam_authenticate+0x40)0x3b69202600

Any ideas as to what may be causing it? The pam config looks like:


#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required pam_env.so
auth sufficient pam_vas3.so create_homedir get_nonvas_pass store_creds
auth requisite pam_vas3.so echo_return
auth sufficient pam_unix.so nullok try_first_pass use_first_pass
auth requisite pam_succeed_if.so uid >= 500 quiet
auth required pam_deny.so

account sufficient pam_vas3.so
account requisite pam_vas3.so echo_return
account required pam_unix.so
account sufficient pam_localuser.so
account sufficient pam_succeed_if.so uid < 500 quiet
account required pam_permit.so

password sufficient pam_vas3.so
password requisite pam_vas3.so echo_return
password requisite pam_cracklib.so try_first_pass retry=3 type=
password sufficient pam_unix.so md5 shadow nullok try_first_pass use_authtok
password required pam_deny.so

session required pam_vas3.so create_homedir
session requisite pam_vas3.so echo_return
session optional pam_keyinit.so revoke
session required pam_limits.so
session [success=1 default=ignore] pam_succeed_if.so service in crond quiet use_uid
session required pam_unix.so