Red Hat Bugzilla – Bug 514463
CVE-2009-2620 firebird-superserver: NULL ptr dereference (DoS) by handling auxiliary connection(s)
Last modified: 2010-02-10 16:42:45 EST
A NULL pointer dereference flaw was found in the way Superserver used to handle (accept and reply to) auxiliary connections. A remote attacker could initiate a specially-crafted auxiliary connection request against the Firebird's Superserver, which would lead to denial of service (firebird crash). References: ----------- http://www.coresecurity.com/content/firebird-sql-dos http://www.securityfocus.com/bid/35842/info Reproducer: ----------- http://www.securityfocus.com/data/vulnerabilities/exploits/35842.py Upstream changesets: -------------------- http://tracker.firebirdsql.org/browse/CORE-2563 (search for "Version control") Patch: ------ http://firebird.cvs.sourceforge.net/viewvc/firebird/firebird2/src/remote/server.cpp?r1=1.158.2.6&r2=1.158.2.7&view=patch Log: ---- Dmitry Yemanov committed 1 file to 'Firebird' on branch 'B2_1_Release' [20/Jul/09 10:06 AM] Fixed two issues for the case of non-authorized op_connect_request: 1) Missing error reporting which makes the client to stall forever 2) CORE-2563: Possible DoS attack using the malformed packet sent into the connection port Credit: ------- Vulnerability discovered and researched by Francisco Falcon from Core Security Technologies.
This issue affects the versions of firebird package, as shipped with Fedora releases of 10 and 11. This issue affects the versions of firebird package, as shipped within Extra Packages for Enterprise Linux 4 (EPEL4) and Extra Packages for Enterprise Linux 5 (EPEL5) projects. Please fix. Further note: Please ensure to mention a relevant CVE identifier (CVE-2009-2620) in the firebird's rpm Changelog, when scheduling Fedora updates.
firebird-2.1.3.18185.0-1.fc10 has been submitted as an update for Fedora 10. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-1.fc10
firebird-2.1.3.18185.0-1.el5 has been submitted as an update for Fedora EPEL 5. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-1.el5
firebird-2.1.3.18185.0-1.el4 has been submitted as an update for Fedora EPEL 4. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-1.el4
firebird-2.1.3.18185.0-1.fc11 has been submitted as an update for Fedora 11. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-1.fc11
firebird-2.1.3.18185.0-1.el4 has been pushed to the Fedora EPEL 4 stable repository. If problems still persist, please make note of it in this bug report.
firebird-2.1.3.18185.0-2.fc10 has been submitted as an update for Fedora 10. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-2.fc10
firebird-2.1.3.18185.0-2.el4 has been submitted as an update for Fedora EPEL 4. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-2.el4
firebird-2.1.3.18185.0-2.fc11 has been submitted as an update for Fedora 11. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-2.fc11
firebird-2.1.3.18185.0-2.el5 has been submitted as an update for Fedora EPEL 5. http://admin.fedoraproject.org/updates/firebird-2.1.3.18185.0-2.el5
firebird-2.1.3.18185.0-2.el4 has been pushed to the Fedora EPEL 4 stable repository. If problems still persist, please make note of it in this bug report.
firebird-2.1.3.18185.0-2.el5 has been pushed to the Fedora EPEL 5 stable repository. If problems still persist, please make note of it in this bug report.
firebird-2.1.3.18185.0-2.fc10 has been pushed to the Fedora 10 stable repository. If problems still persist, please make note of it in this bug report.
firebird-2.1.3.18185.0-2.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.