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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.3058 cURL -- Multiple vulnerabilities 30 November 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: cURL Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-8818 CVE-2017-8817 CVE-2017-8816 Reference: ESB-2017.3040 ESB-2017.3037 Original Bulletin: http://www.vuxml.org/freebsd/301a01b7-d50e-11e7-ac58-b499baebfeaf.html - --------------------------BEGIN INCLUDED TEXT-------------------- cURL -- Multiple vulnerabilities Affected packages 7.21.0 < curl < 7.57.0 Details VuXML ID 301a01b7-d50e-11e7-ac58-b499baebfeaf Discovery 2017-11-29 Entry 2017-11-29 The cURL project reports: NTLM buffer overflow via integer overflow (CVE-2017-8816) libcurl contains a buffer overrun flaw in the NTLM authentication code. The internal function Curl_ntlm_core_mk_ntlmv2_hash sums up the lengths of the user name + password (= SUM) and multiplies the sum by two (= SIZE) to figure out how large storage to allocate from the heap. FTP wildcard out of bounds read (CVE-2017-8817) libcurl contains a read out of bounds flaw in the FTP wildcard function. libcurl's FTP wildcard matching feature, which is enabled with the CURLOPT_WILDCARDMATCH option can use a built-in wildcard function or a user provided one. The built-in wildcard function has a flaw that makes it not detect the end of the pattern string if it ends with an open bracket ([) but instead it will continue reading the heap beyond the end of the URL buffer that holds the wildcard. SSL out of buffer access (CVE-2017-8818) libcurl contains an out boundary access flaw in SSL related code. When allocating memory for a connection (the internal struct called connectdata), a certain amount of memory is allocated at the end of the struct to be used for SSL related structs. Those structs are used by the particular SSL library libcurl is built to use. The application can also tell libcurl which specific SSL library to use if it was built to support more than one. References CVE Name CVE-2017-8816 CVE Name CVE-2017-8817 CVE Name CVE-2017-8818 URL https://curl.haxx.se/changes.html - --------------------------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. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== 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 iQIVAwUBWh+jLIx+lLeg9Ub1AQhnFA/8DgteedHbdyYhtuLQQ2DH1MelH+wA+ICT 63OqMHYUpzwJ0BwfvCEzA041mqbl7aWqcDMl1E8OVnjM3zXoovB4UAJY7lIuf2A2 MqN+HcUS42pBBIYUvRGTOJbhuOlJDXtFJmzOk/W0VbUY2HlUI2HQXcczsdOcU/Gv eBSH7c68xyS8Gh3lJN1UuXExQt6Gqeu8r614O7bu8iP8qRxB4auAl6GkAwa/Frhw CWcYvAPPM/bla7Km3R3JtY2Jev8KfFAJiVhWr83lm5ZFr9lZ3j9/pasfvVDMyqgb zJq0QD4L7zYc3RnY+kXY1+Lcdks3Hx76umfSSmjQ/g3vaAtu6M0vCP5IkZmeVSfG jv79+3L3qXor/3GNVnco44fY3LqBtUs4LIxuWr4dnSO/YMsvEmCcDKnRSF6Jy7Tf pvZH7rd1lsfekZPGrI2cyJ8jsaECREidgn6TXxo1imB2COoaAnnvwvHQbJe+5PMq TfSZ+98qOJtbmtXhqkpeheqbe1bKJ2Y3o8vBNdqqhcJvE4KOZIqSQy2JkLGPGw9i AHvqNoP7SOCGb4Dr18Nh3CvDieelVcYJZluw3zGgIGxEPv4tU35hP9NmFw3TUn/O 7Gx4y45WQbtOAYcUclH6nho9jWufRU2BHIB/z+ld0zTN+mk/apS9GaIKGFwbBZ/v JxHFDILnr0E= =AjFc -----END PGP SIGNATURE-----