Insufficient checks in the UDF subsystem in Firebird 2.5.x before 2.5.7 and 3.0.x before 3.0.2 allow remote authenticated users to execute code by using a 'system' entrypoint from fbudf.so.

Buffer overflow in Firebird 1.0.2 and other versions before 1.5, and possibly other products that use the InterBase codebase, allows local users to execute arbitrary code via a long INTERBASE environment variable when calling (1) gdsinetserver, (2) gdslockmgr, or (3) gdsdrop.

Buffer overflow gdslockmgr of Interbase Database 6.x allows local users to gain privileges via a long ISCLOCKENV environment variable (INTERBASELOCK).

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the sdldesc() function does not validate the length of a decoded SDL descriptor from a slice packet. A zero-length descriptor is later used to calculate the number of slice items, causing a division by zero. An unauthenticated attacker can exploit this by sending a crafted slice packet to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the external engine plugin loader concatenates a user-supplied engine name into a filesystem path without filtering path separators or .. components. An authenticated user with CREATE FUNCTION privileges can use a crafted ENGINE name to load an arbitrary shared library from anywhere on the filesystem via path traversal. The library's initialization code executes immediately during loading, before Firebird validates the module, achieving code execution as the server's OS account. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdrstatusvector() function does not handle the iscargcstring type when decoding an opresponse packet, causing a server crash when one is encountered in the status vector. An unauthenticated attacker can exploit this by sending a crafted opresponse packet to the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when deserializing a slice packet, the xdrdatum() function does not validate that a cstring length conforms to the slice descriptor bounds, allowing a cstring longer than the allocated buffer to overflow it. An unauthenticated attacker can exploit this by sending a crafted packet to the server, potentially causing a crash or other security impact. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions FB3 of the client library placed incorrect data length values into XSQLDA fields when communicating with FB4 or higher servers, resulting in an information leak. This issue is fixed by upgrading to the FB4 client or higher.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when processing CNCTspecificdata segments during authentication, the server assumes segments arrive in strictly ascending order. If segments arrive out of order, the Array class's grow() method computes a negative size value, causing a SIGSEGV crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions prior to 6.0.0, 5.0.4, 4.0.7 and 3.0.14, when processing an opslice network packet, the server passes an unprepared structure containing a null pointer to the SDLinfo() function, resulting in a null pointer dereference and server crash. An unauthenticated attacker can trigger this by sending a crafted packet to the server port. This issue has been fixed in versions 6.0.0, 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, when the server receives an opcryptkeycallback packet without prior authentication, the portservercryptcallback handler is not initialized, resulting in a null pointer dereference and server crash. An unauthenticated attacker who knows only the server's IP and port can exploit this to crash the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.

Firebird is a relational database. Versions 4.0.0 through 4.0.3 and version 5.0 beta1 are vulnerable to a server crash when a user uses a specific form of SET BIND statement. Any non-privileged user with minimum access to a server may type a statement with a long CHAR length, which causes the server to crash due to stack corruption. Versions 4.0.4.2981 and 5.0.0.117 contain fixes for this issue. No known workarounds are available.

Firebird is a relational database. Prior to versions 3.0.13, 4.0.6, and 5.0.3, there is an XDR message parsing NULL pointer dereference denial-of-service vulnerability in Firebird. This specific flaw exists within the parsing of xdr message from client. It leads to NULL pointer dereference and DoS. This issue has been patched in versions 3.0.13, 4.0.6, and 5.0.3.

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 'B21Release' [20/Jul/09 10:06 AM] Fixed two issues for the case of non-authorized opconnectrequest: 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.

Firebird is a relational database. Prior to snapshot versions 4.0.6.3183, 5.0.2.1610, and 6.0.0.609, Firebird is vulnerable if ExtConnPoolSize is not set equal to 0. If connections stored in ExtConnPool are not verified for presence and suitability of the CryptCallback interface is used when created versus what is available could result in a segfault in the server process. Encrypted databases, accessed by execute statement on external, may be accessed later by an attachment missing a key to that database. In a case when execute statement are chained, segfault may happen. Additionally, the segfault may affect unencrypted databases. This issue has been patched in snapshot versions 4.0.6.3183, 5.0.2.1610, and 6.0.0.609 and point releases 4.0.6 and 5.0.2. A workaround for this issue involves setting ExtConnPoolSize equal to 0 in firebird.conf.

Last updated 24 July 2024

An authenticated remote attacker can execute arbitrary code in Firebird SQL Server versions 2.5.7 and 3.0.2 by executing a malformed SQL statement.

Backdoor account in Interbase database server allows remote attackers to overwrite arbitrary files using stored procedures.

Buffer overflow in ibserver for Firebird Database 1.0 and other versions before 1.5, and possibly other products that use the InterBase codebase, allows remote attackers to cause a denial of service (crash) via a long database name, as demonstrated using the gsec command.

Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7 allows remote attackers to determine the location of files on a user's hard drive by obscuring a file upload control and tricking the user into dragging text into that control.

The (1) Mozilla 1.6, (2) Firebird 0.7 and (3) Firefox 0.8 web browsers do not properly verify that cached passwords for SSL encrypted sites are only sent via SSL encrypted sessions to the site, which allows a remote attacker to cause a cached password to be sent in cleartext to a spoofed site.

The (1) Mozilla 1.6, (2) Firebird 0.7, (3) Firefox 0.8, and (4) Netscape 7.1 web browsers do not properly prevent a frame in one domain from injecting content into a frame that belongs to another domain, which facilitates web site spoofing and other attacks, aka the frame injection vulnerability.

Firebird 1.5 allows remote authenticated users without SYSDBA and owner permissions to overwrite a database by creating a database.

fblockmgr in Firebird 1.5 uses weak permissions (0666) for the semaphore array, which allows local users to cause a denial of service (blocked query processing) by locking semaphores.

Multiple buffer overflows in Firebird 1.5, one of which affects WNET, have unknown impact and attack vectors. NOTE: this issue might overlap CVE-2006-1240.

Multiple unspecified vulnerabilities in Firebird 1.5 allow remote attackers to (1) cause a denial of service (application crash) by sending many remote protocol versions; and (2) cause a denial of service (connection drop) via certain network traffic, as demonstrated by Nessus vulnerability scanning.

Firebird 1.5.2.4731 installs (1) fblockmgr, (2) gdsdrop, and (3) fbinetserver with setuid firebird permissions, which might allow local users to gain privileges via a buffer overflow as identified by CVE-2006-1240, or possibly other vulnerabilities.

Buffer overflow in inetserver.cpp in (1) fbinetserver and (2) fbserver in Firebird 1.5.2.4731 allows local users to gain privileges via a long value of the -p argument.

Multiple stack-based buffer overflows in Firebird LI 1.5.3.4870 and 1.5.4.4910, and WI 1.5.3.4870 and 1.5.4.4910, allow remote attackers to execute arbitrary code via (1) a long service attach request on TCP port 3050 to the SVCattach function or (2) unspecified vectors involving the INETconnect function.