| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| A vulnerability in the SSL VPN feature for Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition.
This vulnerability is due to a logic error in memory management when the device is handling SSL VPN connections. An attacker could exploit this vulnerability by sending crafted SSL/TLS packets to the SSL VPN server of the affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. |
| A vulnerability in the VPN web client services component of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct browser-based attacks against users of an affected device. This vulnerability is due to improper validation of input that is passed to the VPN web client services component before being returned to the browser that is in use. An attacker could exploit this vulnerability by persuading a user to visit a website that is designed to pass malicious requests to a device that is running Cisco ASA Software or Cisco FTD Software and has web services endpoints supporting VPN features enabled. A successful exploit could allow the attacker to reflect malicious input from the affected device to the browser that is in use and conduct browser-based attacks, including cross-site scripting attacks. The attacker could not directly impact the affected device. |
| A vulnerability in the IP fragment-handling implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a memory leak on an affected device. This memory leak could prevent traffic from being processed through the device, resulting in a denial of service (DoS) condition. The vulnerability is due to improper error handling when specific failures occur during IP fragment reassembly. An attacker could exploit this vulnerability by sending crafted, fragmented IP traffic to a targeted device. A successful exploit could allow the attacker to continuously consume memory on the affected device and eventually impact traffic, resulting in a DoS condition. The device could require a manual reboot to recover from the DoS condition. Note: This vulnerability applies to both IP Version 4 (IPv4) and IP Version 6 (IPv6) traffic. |
| A vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or an authenticated, remote attacker to establish a clientless SSL VPN session with an unauthorized user.
This vulnerability is due to improper separation of authentication, authorization, and accounting (AAA) between the remote access VPN feature and the HTTPS management and site-to-site VPN features. An attacker could exploit this vulnerability by specifying a default connection profile/tunnel group while conducting a brute force attack or while establishing a clientless SSL VPN session using valid credentials. A successful exploit could allow the attacker to achieve one or both of the following:
Identify valid credentials that could then be used to establish an unauthorized remote access VPN session.
Establish a clientless SSL VPN session (only when running Cisco ASA Software Release 9.16 or earlier).
Notes:
Establishing a client-based remote access VPN tunnel is not possible as these default connection profiles/tunnel groups do not and cannot have an IP address pool configured.
This vulnerability does not allow an attacker to bypass authentication. To successfully establish a remote access VPN session, valid credentials are required, including a valid second factor if multi-factor authentication (MFA) is configured.
Cisco will release software updates that address this vulnerability. There are workarounds that address this vulnerability. |
| A vulnerability in the Dynamic Access Policies (DAP) feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly. To exploit this vulnerability, an attacker would need valid remote access VPN user credentials on the affected device.
This vulnerability is due to improper validation of data in HTTPS POST requests. An attacker could exploit this vulnerability by sending a crafted HTTPS POST request to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition. |
| A vulnerability in the handling of the embryonic connection limits in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause incoming TCP SYN packets to be dropped incorrectly.
This vulnerability is due to improper handling of new, incoming TCP connections that are destined to management or data interfaces when the device is under a TCP SYN flood attack. An attacker could exploit this vulnerability by sending a crafted stream of traffic to an affected device. A successful exploit could allow the attacker to prevent all incoming TCP connections to the device from being established, including remote management access, Remote Access VPN (RAVPN) connections, and all network protocols that are TCP-based. This results in a denial of service (DoS) condition for affected features. |
| Cisco PIX and ASA appliances with 7.1 and 7.2 software, when configured for TLS sessions to the device, allow remote attackers to cause a denial of service (device reload) via a crafted TLS packet, aka CSCsg43276 and CSCsh97120. |
| Cisco PIX and ASA appliances with 7.0 through 8.0 software, and Cisco Firewall Services Module (FWSM) 3.1(5) and earlier, allow remote attackers to cause a denial of service (device reload) via a crafted MGCP packet, aka CSCsi90468 (appliance) and CSCsi00694 (FWSM). |
| Multiple clientless SSL VPN products that run in web browsers, including Stonesoft StoneGate; Cisco ASA; SonicWALL E-Class SSL VPN and SonicWALL SSL VPN; SafeNet SecureWire Access Gateway; Juniper Networks Secure Access; Nortel CallPilot; Citrix Access Gateway; and other products, when running in configurations that do not restrict access to the same domain as the VPN, retrieve the content of remote URLs from one domain and rewrite them so they originate from the VPN's domain, which violates the same origin policy and allows remote attackers to conduct cross-site scripting attacks, read cookies that originated from other domains, access the Web VPN session to gain access to internal resources, perform key logging, and conduct other attacks. NOTE: it could be argued that this is a fundamental design problem in any clientless VPN solution, as opposed to a commonly-introduced error that can be fixed in separate implementations. Therefore a single CVE has been assigned for all products that have this design |
| Memory leak in Cisco Adaptive Security Appliances (ASA) 5500 Series and PIX Security Appliances 8.0 before 8.0(4) and 8.1 before 8.1(2) allows remote attackers to cause a denial of service (memory consumption) via an unspecified sequence of packets, related to the "initialization code for the hardware crypto accelerator." |
| Unspecified vulnerability in Cisco Adaptive Security Appliances (ASA) 5500 Series and PIX Security Appliances 7.2(4)9 and 7.2(4)10 allows remote attackers to cause a denial of service (device reload) via a crafted IPv6 packet. |
| Cisco Adaptive Security Appliance (ASA) running PIX 7.0 before 7.0.7.1, 7.1 before 7.1.2.61, 7.2 before 7.2.2.34, and 8.0 before 8.0.2.11, when AAA is enabled, composes %ASA-5-111008 messages from the "test aaa" command with cleartext passwords and sends them over the network to a remote syslog server or places them in a local logging buffer, which allows context-dependent attackers to obtain sensitive information. |
| Unspecified vulnerability on Cisco Adaptive Security Appliances (ASA) 5500 Series devices 7.0 before 7.0(8)6, 7.1 before 7.1(2)82, 7.2 before 7.2(4)26, 8.0 before 8.0(4)24, and 8.1 before 8.1(2)14, when H.323 inspection is enabled, allows remote attackers to cause a denial of service (device reload) via a crafted H.323 packet. |
| Cisco Adaptive Security Appliance (ASA) and Cisco PIX security appliance 7.1.x before 7.1(2)70, 7.2.x before 7.2(4), and 8.0.x before 8.0(3)10 allows remote attackers to cause a denial of service via a crafted TCP ACK packet to the device interface. |
| The Instant Messenger (IM) inspection engine in Cisco Adaptive Security Appliance (ASA) and Cisco PIX security appliance 7.2.x before 7.2(4), 8.0.x before 8.0(3)10, and 8.1.x before 8.1(1)2 allows remote attackers to cause a denial of service via a crafted packet. |
| Unspecified vulnerability in Cisco Adaptive Security Appliance (ASA) 5500 devices 8.0(3)15, 8.0(3)16, 8.1(1)4, and 8.1(1)5, when configured as a clientless SSL VPN endpoint, allows remote attackers to obtain usernames and passwords via unknown vectors, aka Bug ID CSCsq45636. |
| Cisco Adaptive Security Appliance (ASA) and Cisco PIX security appliance 8.0.x before 8.0(3)9 and 8.1.x before 8.1(1)1 allows remote attackers to cause a denial of service (device reload) via a crafted Transport Layer Security (TLS) packet to the device interface. |
| Unspecified vulnerability in Cisco Adaptive Security Appliance (ASA) and PIX 7.2 before 7.2(2)8, when using Layer 2 Tunneling Protocol (L2TP) or Remote Management Access, allows remote attackers to bypass LDAP authentication and gain privileges via unknown vectors. |
| The HTTP server in Cisco Adaptive Security Appliance (ASA) 5500 devices 8.0 before 8.0(3)15 and 8.1 before 8.1(1)5, when configured as a clientless SSL VPN endpoint, does not properly process URIs, which allows remote attackers to cause a denial of service (device reload) via a URI in a crafted SSL or HTTP packet, aka Bug ID CSCsq19369. |
| Unspecified vulnerability on Cisco Adaptive Security Appliances (ASA) 5500 Series devices 8.0 before 8.0(4)25 and 8.1 before 8.1(2)15, when an SSL VPN or ASDM access is configured, allows remote attackers to cause a denial of service (device reload) via a crafted (1) SSL or (2) HTTP packet. |
