A DoS condition exists in the Linux kernel knfsd server. Remote, unauthenticated users (i.e. those with neither a directory mounted nor permission to mount one) can OOPS the host kernel. The OOPS does not bring down the target host, but it is possible to render the NFS service inoperable until a reboot.
7a554cf14acdc3fef95cadd5e0b687b47576cc0e8024390737cb14e3860d6e69A remote, unauthenticated attacker could send a single, specially crafted Programmable Controller Communication Commands (PCCC) packet to the controller that could potentially cause the controller to enter a DoS condition. MicroLogix 1100 controllers are affected: 1763-L16BWA, 1763-L16AWA, 1763-L16BBB, and 1763-L16DWD.
3ab43f2aad2ad268d6ef3e289e8ddb206f6f4ae009a223ded362047bff0b67e7Whitepaper called DOSfuscation: Exploring the Depths of CMD.exe Obfuscation and Detection Techniques.
409e2b8687a76174f5fa96d055dd6d91550c650388b0d2922e1f0ba7ead480f2Cisco Security Advisory - A vulnerability in the DHCP client implementation of Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability occurs during the parsing of a crafted DHCP packet. An attacker could exploit this vulnerability by sending crafted DHCP packets to an affected device that is configured as a DHCP client. A successful exploit could allow the attacker to cause a reload of an affected device, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
9128134a4778e4b6128fd57912ce670d99b70dd87d2acfe189b66ebf145284ceCisco Security Advisory - A vulnerability in a proprietary device driver in the kernel of Cisco TelePresence Multipoint Control Unit (MCU) Software could allow an unauthenticated, remote attacker to execute arbitrary code or cause a denial of service (DoS) condition. The vulnerability is due to improper size validation when reassembling fragmented IPv4 or IPv6 packets. An attacker could exploit this vulnerability by sending crafted IPv4 or IPv6 fragments to a port receiving content in Passthrough content mode. An exploit could allow the attacker to overflow a buffer. If successful, the attacker could execute arbitrary code or cause a DoS condition on the affected system. Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are not available.
b25ac4e0a30adf1e190b4cdde7f8af8749cd2dec6e09663e29c25b6921ea28a5Cisco Security Advisory - A vulnerability in the received packet parser of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) software could allow an unauthenticated, remote attacker to cause a reload of the affected system, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient size validation of user-supplied data. An attacker could exploit this vulnerability by sending crafted H.224 data in Real-Time Transport Protocol (RTP) packets in an H.323 call. An exploit could allow the attacker to overflow a buffer in a cache that belongs to the received packet parser, which will result in a crash of the application, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
e38280c54046f87c9130ec4824a4152f839104804c03a19b62b8d53b7ab0c984Cisco Security Advisory - A vulnerability in the data plane IP fragment handler of the Adaptive Security Appliance (ASA) CX Context-Aware Security module could allow an unauthenticated, remote attacker to cause the CX module to be unable to process further traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of IP fragments. An attacker could exploit this vulnerability by sending fragmented IP traffic across the CX module. An exploit could allow the attacker to exhaust free packet buffers in shared memory (SHM), causing the CX module to be unable to process further traffic, resulting in a DoS condition. Cisco has not released and will not release software updates that address this vulnerability. There are no workarounds that address this vulnerability.
360234b583a96365ec769e58bf559cda974f2537dd62ac3a8ca202d463fbc744Cisco Security Advisory - The Smart Install client feature in Cisco IOS and IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a memory leak and eventual denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of image list parameters. An attacker could exploit this vulnerability by sending crafted Smart Install packets to TCP port 4786. A successful exploit could cause a Cisco Catalyst switch to leak memory and eventually reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability other than disabling Smart Install functionality on the affected device.
a148836287ff37df7a6160852705022c6c49dfe1768ef65b38854aac3c0eda81Cisco Security Advisory - A vulnerability in the HTTP framework of Cisco Small Business SPA300 Series IP Phones, Cisco Small Business SPA500 Series IP Phones, and Cisco SPA51x IP Phones could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of malformed HTTP traffic. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. An exploit could allow the attacker to deny service continually by sending crafted HTTP requests to a phone, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. Workarounds that address this vulnerability are not available.
899c8995efd36f53e8fcb7f2a34120edfb3bed08afe4753d1cfcd4de9c447c31Cisco Security Advisory - A vulnerability in the driver processing functions of Cisco IOS XR Software for Cisco ASR 9001 Aggregation Services Routers could allow an unauthenticated, remote attacker to cause a memory leak on the route processor (RP) of an affected device, which could cause the device to drop all control-plane protocols and lead to a denial of service condition (DoS) on a targeted system. The vulnerability is due to improper handling of crafted, fragmented packets that are directed to an affected device. An attacker could exploit this vulnerability by sending crafted, fragmented packets to an affected device for processing and reassembly. A successful exploit could allow the attacker to cause a memory leak on the RP of the device, which could cause the device to drop all control-plane protocols and eventually lead to a DoS condition on the targeted system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. However, there are mitigations for this vulnerability.
0f8053bc0738b5eb624d423cfbff6b3798c7960f57b14cc33a6ae35d37855c49Cisco Security Advisory - A vulnerability in Session Initiation Protocol (SIP) processing functions of the Cisco Unified Communications Manager Instant Messaging (IM) and Presence Service could allow an unauthenticated, remote attacker to cause the Cisco SIP Proxy Daemon (sipd) process to restart unexpectedly, resulting in a denial of service (DoS) condition on a targeted system. The vulnerability is due to improper input validation of SIP packet headers. An attacker could exploit this vulnerability by sending a crafted SIP packet to a targeted system. A successful exploit could allow the attacker to cause the sipd process to restart unexpectedly, resulting in a DoS condition on the system. If the sipd process restarts repeatedly, a successful exploit could also result in a sustained DoS condition and cause high disk utilization due to a large number of sipd core files being written to disk, which could exacerbate the DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
709b72ee108c411b6c7c20133962a815f9a8c96ed786029e5343a7d0c7e9ec05Cisco Security Advisory - A vulnerability in the IPv6 packet decode function of the Cisco Network Analysis Module (NAM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to an improper calculation of the IPv6 payload length of certain IPv6 packets. An attacker could exploit this vulnerability by sending crafted IPv6 packets on the network where the NAM is collecting and monitoring traffic. An exploit could allow the attacker to cause a DoS condition and the NAM could cease to collect and monitor traffic for a short time. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
51f69964f7439cfe1bae3d80db56bd007b12e61cdc735671b6e92a4cbc93ecf0Cisco Security Advisory - A vulnerability in the IP Version 6 (IPv6) packet processing functions of Cisco IOS XR Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to stop processing IPv6 traffic, leading to a denial of service (DoS) condition on the device. The vulnerability is due to insufficient processing logic for crafted IPv6 packets that are sent to an affected device. An attacker could exploit this vulnerability by sending crafted IPv6 Neighbor Discovery packets to an affected device for processing. A successful exploit could allow the attacker to cause the device to stop processing IPv6 traffic, leading to a DoS condition on the device. Cisco will release software updates that address this vulnerability. There are no workarounds that address this vulnerability.
422dd95ef9c0a22224d798a49ef218e76220a608771dbadde196bfc3eb0fb2fbCisco Security Advisory - A vulnerability in Cisco AsyncOS for the Cisco Web Security Appliance (WSA) when the software handles a specific HTTP response code could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an appliance because the appliance runs out of system memory. The vulnerability occurs because the software does not free client and server connection memory and system file descriptors when a certain HTTP response code is received in the HTTP request. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. An exploit could allow the attacker to cause a DoS condition because the appliance runs out of system memory. When this happens, the device can no longer accept new incoming connection requests. Cisco has released software updates that address this vulnerability. A workaround that addresses this vulnerability is also available.
b11575ce8d127f5df49b01eb0c86396ad5782f7a7e0f3bdae2fdeb9a80362008Cisco Security Advisory - A vulnerability in HTTP request parsing in Cisco AsyncOS for the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition when the proxy process unexpectedly restarts. The vulnerability occurs because the affected software does not properly allocate space for the HTTP header and any expected HTTP payload. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. An exploit could allow the attacker to cause a DoS condition when the proxy process unexpectedly reloads, which can cause traffic to be dropped. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
21c673b47e281e2e70421d9a8907f9602e0c7e17e628d35171c925eb9e710b26Cisco Security Advisory - A vulnerability that occurs when parsing an HTTP POST request with Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) vulnerability due to the proxy process becoming unresponsive. The vulnerability is due to a lack of proper input validation of the packets that make up the HTTP POST request. An attacker could exploit this vulnerability by sending a crafted HTTP POST request to the affected device. An exploit could allow the attacker to cause a DoS condition due to the proxy process becoming unresponsive and the WSA reloading. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
3989f6fd6c41f3bf8e2da257cae824d30c420fefadc7c41c4e080ea8c438bbfaCisco Security Advisory - Cisco released version 1.5.3 of the Secure Real-Time Transport Protocol (SRTP) library (libSRTP), which addresses a denial of service (DoS) vulnerability. Multiple Cisco products incorporate a vulnerable version of the libSRTP library. The vulnerability is in the encryption processing subsystem of libSRTP and could allow an unauthenticated, remote attacker to trigger a DoS condition. The vulnerability is due to improper input validation of certain fields of SRTP packets. An attacker could exploit this vulnerability by sending a crafted SRTP packet designed to trigger the issue to an affected device. The impact of this vulnerability on Cisco products may vary depending on the affected product. Details about the impact on each product are outlined in the "Conditions" section of each Cisco bug for this vulnerability. The bug IDs are listed at the top of this advisory and in the table in "Vulnerable Products."
78fe5bc5630f5e6bb6ffdb225fd6049b8821eb6181ae5e2c77b75655f6bb9121Cisco Security Advisory - A vulnerability in the HTTP URL redirect feature of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a buffer overflow condition on an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of HTTP traffic by the affected software. An attacker could exploit this vulnerability by sending a crafted HTTP request to an affected device. A successful exploit could allow the attacker to cause a buffer overflow condition on the device, which could allow the attacker to cause the device to reload, resulting in a DoS condition, or execute arbitrary code on the device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
80beed554e809e8a5870224a154380f8f23caadf7d76dc0972162a6d1b575909Cisco Security Advisory - A vulnerability in the Bonjour task manager of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper handling of Bonjour traffic by the affected software. An attacker could exploit this vulnerability by sending crafted Bonjour traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
cdc30beb702f0e49569edc1e6a47e2492634d2280ded85af9b61c7a398b3c5b1Cisco Security Advisory - A vulnerability in the web-based management interface of Cisco Wireless LAN Controller (WLC) devices running Cisco AireOS Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to the presence of unsupported URLs in the web-based device management interface provided by the affected software. An attacker could exploit this vulnerability by attempting to access a URL that is not generally accessible from and supported by the management interface. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
cc7c61582a3a61aaedc912d02cc2f5089a42bb405fe4aade132697a4c20e10f6Cisco Security Advisory - The Smart Install client feature in Cisco IOS and IOS XE Software contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incorrect handling of image list parameters. An attacker could exploit this vulnerability by sending crafted Smart Install packets to TCP port 4786. A successful exploit could cause a Cisco Catalyst switch to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability other than disabling Smart Install functionality on the vulnerable device.
18b930eb75967cb7ea01a0eaf7a974f21b10af07b68ca43711cc30f589a17f1cCisco Security Advisory - A vulnerability in the web proxy framework of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker with the ability to negotiate a secure connection from within the trusted network to cause a denial of service (DoS) condition on the affected device. The vulnerability is due to incorrect processing of HTTPS packets. An attacker could exploit this vulnerability by sending a malformed HTTPS request packet through the affected device. A successful exploit could allow an attacker to create a DoS condition, causing all requests traversing the WSA to be dropped. The condition is temporary and no manual intervention is required to restore functionality. Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available.
b61056cc436d6411ccd61d17f85de34dbd24fd081a1c562f8aa2cea0e14b9b1bCisco Security Advisory - A vulnerability in the TCP stack of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to improper processing of certain TCP packets in the closing sequence of a TCP session while the affected device is in a TIME_WAIT state. An attacker could exploit this vulnerability by sending a specific TCP packet to an affected device on a TCP session that is already in a TIME_WAIT state. An exploit could allow the attacker to cause a reload of the TCP stack on the affected device, resulting in a DoS condition. This vulnerability can be exploited using either IPv4 or IPv6 packets. The vulnerability can be triggered by a crafted sequence of TCP packets destined for TCP ports listening on the device. The packets may use the IPv4 or IPv6 unicast address of any interface configured on the device. This vulnerability can be triggered only by traffic destined to an affected device and cannot be exploited using traffic that transits an affected device. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
81766e61e9ea2f14dbbed4c2b4f16f838ecee99b27315464e24df79e86fbee1cCisco Security Advisory - A vulnerability in the ICMP implementation in the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch could allow an unauthenticated, remote attacker to cause the switch to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper handling of an ICMP packet with the IPv4 Type 7 option for record route. An attacker could exploit this vulnerability by sending an ICMP packet with the record route option to an interface on the affected switch. An exploit could allow the attacker to cause a DoS condition because the switch will reload each time the ICMP packet is received. Cisco has released software updates that address this vulnerability. A workaround that addresses this vulnerability is available.
4e61211c39f3367346e5f72f2d3518da0831a44b413fba24d2123cd229d0ca17Cisco Security Advisory - A vulnerability in the Common Internet File System (CIFS) optimization feature of the Cisco Wide Area Application Service (WAAS) device could allow an unauthenticated, remote attacker to perform a resource consumption attack which, could result in a complete denial of service (DoS) condition. The vulnerability is due to insufficient flow handling of incoming CIFS traffic. An attacker could exploit this vulnerability by sending malicious traffic designed to trigger the vulnerability. An exploit could allow the attacker to cause a DoS condition by exhausting system buffering resources, resulting in a reload of the affected device.
2715d13cf76692d67920e23b151a377b19a7661e7d9c847e77de82e2caad3f1cOpenMRS version 2.3 (1.11.4) suffers from an XML external entity processing vulnerability. The vulnerability is caused due to an error when parsing XML entities within ZIP archives and can be exploited to e.g. disclose data from local resources or cause a DoS condition (billion laughs) via a specially crafted XML file including external entity references.
070b2c30afd808c338b88609b0c09df9664f1cb7251179abf50e418c628aac90
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