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Date: Fri, 2 Feb 2018 13:49:37 +0100 From: "Secunia Research" <vuln@...unia.com> To: <oss-security@...ts.openwall.com> Cc: <vuln@...unia.com> Subject: Secunia Research: Linux Kernel USB over IP Multiple Denial of Service Vulnerabilities ====================================================================== Secunia Research 2017/12/11 Linux Kernel USB over IP Multiple Denial of Service Vulnerabilities ====================================================================== Table of Contents Affected Software....................................................1 Severity.............................................................2 Description of Vulnerabilities.......................................3 Solution.............................................................4 Time Table...........................................................5 Credits..............................................................6 References...........................................................7 About Flexera .......................................................8 Verification.........................................................9 ====================================================================== 1) Affected Software Linux Kernel versions 4.1.x prior 4.1.49, 4.4.x prior to 4.4.114, 4.9.x prior to 4.9.71, and 4.14.x prior to 4.14.8. ====================================================================== 2) Severity Rating: Less critical Impact: DoS (Denial of Service) Where: Local Area Network ====================================================================== 3) Description of Vulnerabilities Secunia Research has discovered multiple vulnerabilities in Linux Kernel, which can be exploited by malicious people to cause a DoS (Denial of Service). An error in the "get_pipe()" function (drivers/usb/usbip/stub_rx.c) can be exploited to cause an out-of-bounds read memory access and subsequently trigger a BUG() failure and a kernel crash by sending a specially crafted USB over IP packet. An error in the "stub_recv_cmd_submit()" function (drivers/usb/usbip/stub_rx.c) when handling CMD_SUBMIT packets can be exploited to trigger an arbitrary memory allocation and subsequently cause a kernel crash by sending a specially crafted USB over IP packet. These vulnerabilities are confirmed in version 4.14.0-rc1 and reported in versions 4.4.x prior to 4.4.114, 4.9.x prior to 4.9.71, and 4.14.x prior to 4.14.8. Other versions may also be affected. An error in the "stub_send_ret_submit()" function (drivers/usb/usbip/stub_tx.c) can be exploited to trigger a NULL pointer dereference and subsequently cause a kernel crash by sending a specially crafted USB over IP packet. Successful exploitation of the vulnerabilities requires USB over IP daemon (usbipd) to be running. This vulnerability is confirmed in version 4.14.0-rc1 and reported in versions 4.1.x prior 4.1.49, 4.4.x prior to 4.4.107, 4.9.x prior to 4.9.71, and 4.14.x prior to 4.14.8. Other versions may also be affected. ====================================================================== 4) Solution Update to version 4.1.49, 4.4.114, 4.9.71, or 4.14.8. https://git.kernel.org/linus/635f545a7e8be7596b9b2b6a43cab6bbd5a88e43 https://git.kernel.org/linus/c6688ef9f29762e65bce325ef4acd6c675806366 https://git.kernel.org/linus/be6123df1ea8f01ee2f896a16c2b7be3e4557a5a ====================================================================== 5) Time Table 2017/11/29 - Linux Kernel team contacted with vulnerability details. 2017/11/29 - Linux Kernel team confirmed the vulnerabilities. 2017/12/07 - Public disclosure of the vulnerabilities. 2017/12/11 - Release of Secunia Advisory SA77000. 2017/12/11 - Public disclosure of Secunia Research Advisory. 2017/12/21 - Split Secunia Advisory SA77000 into Secunia Advisories SA77000, SA80722, and SA80601 concerning the vulnerabilities. Updated Secunia Research Advisory due to GIT commits having been applied and certain fixed versions having been released. 2017/12/27 - Updated due to updates of Secunia Advisories SA77000, SA80722, and SA80601. 2018/02/01 - Updated due to updates of Secunia Advisories SA77000, SA80722, and SA80601. ====================================================================== 6) Credits Jakub Jirasek, Secunia Research at Flexera. ====================================================================== 7) References The Flexera CNA has assigned the CVE-2017-16912, CVE-2017-16913, and CVE-2017-16914 identifiers for the vulnerabilities through the Common Vulnerabilities and Exposures (CVE) project. ====================================================================== 8) About Flexera Flexera helps application producers and enterprises increase application usage and the value they derive from their software. http://www.flexera.com Flexera delivers market-leading Software Vulnerability Management solutions enabling enterprises to proactively identify and remediate software vulnerabilities, effectively reducing the risk of costly security breaches. https://www.flexera.com/enterprise/products/ Flexera supports and contributes to the community in several ways. We have always believed that reliable vulnerability intelligence and tools to aid identifying and fixing vulnerabilities should be freely available for consumers to ensure that users, who care about their online privacy and security, can stay secure. Only a few vendors address vulnerabilities in a proper way and help users get updated and stay secure. End-users (whether private individuals or businesses) are otherwise left largely alone, and that is why back in 2002, Secunia Research started investigating, coordinating disclosure and verifying software vulnerabilities. In 2016, Secunia Research became a part of Flexera and today our in-house software vulnerability research remains the core of the Software Vulnerability Management products at Flexera. https://www.flexera.com/enterprise/company/about/secunia-research/ The public Secunia Advisory database contains information for researchers, security enthusiasts, and consumers to lookup individual products and vulnerabilities and assess, whether they need to take any actions to secure their systems or whether a given vulnerability has already been discovered https://secuniaresearch.flexerasoftware.com/community/advisories/ ====================================================================== 9) Verification Please verify this advisory by visiting the Secunia Research website: https://secuniaresearch.flexerasoftware.com/secunia_research/2017-21 ======================================================================
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