Red Hat Bugzilla – Bug 501254
CVE-2009-1378 OpenSSL: DTLS fragment handling memory DoS
Last modified: 2014-08-07 15:00:24 EDT
Common Vulnerabilities and Exposures assigned an identifier CVE-2009-1378 to the following vulnerability:
In dtls1_process_out_of_seq_message() the check if the current message
is already buffered was missing. For every new message was memory
allocated, allowing an attacker to perform an denial of service attack
with sending out of seq handshake messages until there is no memory
left. Additionally every future messege was buffered, even if the
sequence number made no sense and would be part of another handshake.
So only messages with sequence numbers less than 10 in advance will be
but reverted for 0.9.8 http://cvs.openssl.org/chngview?cn=18200
Multiple memory leaks in the dtls1_process_out_of_seq_message function
in ssl/d1_both.c in OpenSSL 0.9.8k and earlier 0.9.8 versions allow
remote attackers to cause a denial of service (memory consumption) via
DTLS records that (1) are duplicates or (2) have sequence numbers much
greater than current sequence numbers, aka "DTLS fragment handling
openssl-0.9.8g-14.fc10 has been submitted as an update for Fedora 10.
openssl-0.9.8g-9.14.fc9 has been submitted as an update for Fedora 9.
openssl-0.9.8k-5.fc11 has been submitted as an update for Fedora 11.
This issue did not affect versions of openssl as shipped in Red Hat Enterprise Linux 3 and 4.
This issue affects openssl version as shipped in Red Hat Enterprise Linux 5 and it will be addressed in the openssl packages update in Red Hat Enterprise Linux 5.4. There is no update planned before than, as both DTLS specification and OpenSSL's implementation is still in development and unlikely to be used in production environments. There is no component shipped in Red Hat Enterprise Linux 5 using OpenSSL's DTLS implementation, except for OpenSSL's testing command line client - openssl.
openssl-0.9.8g-14.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.
openssl-0.9.8g-9.14.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.
openssl-0.9.8k-5.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products:
Red Hat Enterprise Linux 5
Via RHSA-2009:1335 https://rhn.redhat.com/errata/RHSA-2009-1335.html