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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0061 -- [UNIX/Linux] Denial of Service vulnerability in CVSTrac 2.0.0 30 January 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: CVSTrac 2.0.0 Publisher: OpenPKG Operating System: UNIX variants (UNIX, Linux, OSX) Impact: Denial of Service Access: Remote/Unauthenticated CVE Names: CVE-2007-0347 Original Bulletin: http://openpkg.com/go/OpenPKG-SA-2007.008 Comment: This advisory references vulnerabilities in products which run on multiple platforms. It is recommended that administrators running CVSTrac check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ____________________________________________________________________________ Publisher Name: OpenPKG GmbH Publisher Home: http://openpkg.com/ Advisory Id (public): OpenPKG-SA-2007.008 Advisory Type: OpenPKG Security Advisory (SA) Advisory Directory: http://openpkg.com/go/OpenPKG-SA Advisory Document: http://openpkg.com/go/OpenPKG-SA-2007.008 Advisory Published: 2007-01-29 14:02 UTC Issue Id (internal): OpenPKG-SI-20070117.01 Issue First Created: 2007-01-17 Issue Last Modified: 2007-01-29 Issue Revision: 08 ____________________________________________________________________________ Subject Name: cvstrac Subject Summary: VCS web frontend Subject Home: http://www.cvstrac.org/ Subject Versions: * = 2.0.0 Vulnerability Id: CVE-2007-0347 Vulnerability Scope: global (not OpenPKG specific) Attack Feasibility: run-time Attack Vector: remote network Attack Impact: denial of service Description: Ralf S. Engelschall from OpenPKG GmbH discovered a Denial of Service (DoS) vulnerability in the CVS/Subversion/Git Version Control System (VCS) frontend CVSTrac [0], version 2.0.0. The vulnerability is in the Wiki-style text output formatter and is triggered by special text constructs in commit messages, tickets and Wiki pages. Only users with check-in permissions and Wiki or ticket edit permissions can perform an attack. But as the anonymous user usually is granted Wiki edit and ticket creation permissions, an attacker remotely and anonymously can cause a partial DoS (depending on the pages requested) on a CVSTrac installation by opening a new ticket or editing a Wiki page with an arbitrary text containing for instance the string "/foo/bar'quux". The DoS vulnerability exists because the is_eow() function in "format.c" does NOT just check the FIRST character of the supplied string for an End-Of-Word terminating character, but instead iterates over string and this way can skip a single embedded quotation mark. The is_repository_file() function then in turn assumes that the filename string can never contain a single quotation mark and traps into an SQL escaping problem. An SQL injection via this technique is somewhat limited as is_eow() bails on whitespace. So while one _can_ do an SQL injection, one is limited to SQL queries containing only characters which get past the function isspace(3). This effectively limits attacks to SQL commands like "VACUUM". Administrators can quickly workaround by revoking permissions on the users. Restoring those permissions, obviously, would require keeping vulnerable permissions on at least one infrequently used account like "setup" or using the CLI sqlite3(1) to manually add them back later. References: [0] http://www.cvstrac.org/ ____________________________________________________________________________ Primary Package Name: cvstrac Primary Package Home: http://openpkg.org/go/package/cvstrac Corrected Distribution: Corrected Branch: Corrected Package: OpenPKG Enterprise E1.0-SOLID cvstrac-2.0.0-E1.0.2 ____________________________________________________________________________ For security reasons, this document was digitally signed with the OpenPGP public key of the OpenPKG GmbH (public key id 61B7AE34) which you can download from http://openpkg.com/openpkg.com.pgp or retrieve from the OpenPGP keyserver at hkp://pgp.openpkg.org/. Follow the instructions at http://openpkg.com/security/signatures/ for more details on how to verify the integrity of this document. ____________________________________________________________________________ - -----BEGIN PGP SIGNATURE----- Comment: OpenPKG GmbH <http://openpkg.com/> iD8DBQFFvfCEZwQuyWG3rjQRApMLAJ0Q/mkpIIar3VjFoMVay7b70i5DIwCfX8lJ 6ITu0bSW6c3RR9sQ6q6cIpQ= =kxz6 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRb5+RSh9+71yA2DNAQJztAP/aiEbs/ieUiTYehxDFPhClVxuAMNZdSRF ztiXYx5GCZ20KpgV2lIii7OmtdgNJJqWT9dSt5g+pRikhoLjYUeg2V/epYbp+N/w fmtymFjRTE7yzm0/lPcvalyYSmf+KtBetKGU+4iKv3PL+8lK2P35oMbGfTvDeMSb qg6tmTy/LXQ= =2IJy -----END PGP SIGNATURE-----