Cisco Adaptive Security Appliance Software AnyConnect SSL VPN DoS (cisco-sa-vpndtls-dos-TunzLEV)

According to its self-reported version, Cisco ASA Software is affected by a vulnerability in the implementation of the Datagram TLS DTLS protocol that could allow an unauthenticated, remote attacker to cause high CPU utilization, resulting in a denial of service DoS condition. This vulnerability ...

CVE-2022-20795

A vulnerability in the implementation of the Datagram TLS DTLS protocol in Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause high CPU utilization, resulting in a denial of service DoS condition...

CVE-2022-20795

A vulnerability in the implementation of the Datagram TLS DTLS protocol in Cisco Adaptive Security Appliance ASA Software and Cisco Firepower Threat Defense FTD Software could allow an unauthenticated, remote attacker to cause high CPU utilization, resulting in a denial of service DoS condition...

PT-2021-7020 · Cisco · Cisco Ftd +1

Name of the Vulnerable Software and Affected Versions: Cisco Adaptive Security Appliance ASA Software affected versions not specified Cisco Firepower Threat Defense FTD Software affected versions not specified Description: A vulnerability in the implementation of the Datagram TLS DTLS protocol...

PT-2021-4604 · Cisco · Cisco Asa +1

Name of the Vulnerable Software and Affected Versions: Cisco Adaptive Security Appliance ASA Software and Firepower Threat Defense FTD Software affected versions not specified Description: A vulnerability in the software-based SSL/TLS message handler could allow an unauthenticated, remote attacke...

OpenSSL: Invalid free in DTLS

An invalid-free flaw was found in the way OpenSSL handled certain DTLS handshake messages. A malicious DTLS client or server could send a specially crafted message to the peer, which could cause the application to crash or potentially result in arbitrary code execution...

openssl: DTLS memory exhaustion DoS when messages are not removed from fragment buffer

It was discovered that the Datagram TLS DTLS implementation could fail to release memory in certain cases. A malicious DTLS client could cause a DTLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory...

openssl: DTLS replay protection bypass allows DoS against DTLS connection

A flaw was found in the Datagram TLS DTLS replay protection implementation in OpenSSL. A remote attacker could possibly use this flaw to make a DTLS server using OpenSSL to reject further packets sent from a DTLS client over an established DTLS connection...

ALPINE-CVE-2016-2181

The Anti-Replay feature in the DTLS implementation in OpenSSL before 1.1.0 mishandles early use of a new epoch number in conjunction with a large sequence number, which allows remote attackers to cause a denial of service false-positive packet drops via spoofed DTLS records, related to reclayerd1...

CVE-2016-2179

It was discovered that the Datagram TLS DTLS implementation could fail to release memory in certain cases. A malicious DTLS client could cause a DTLS server using OpenSSL to consume an excessive amount of memory and, possibly, exit unexpectedly after exhausting all available memory...

openssl: DTLS segmentation fault in dtls1_get_record

A NULL pointer dereference flaw was found in the DTLS implementation of OpenSSL. A remote attacker could send a specially crafted DTLS message, which would cause an OpenSSL server to crash...

LibreSSL Double Release Vulnerability

LibreSSL is a fork of the OpenSSL cryptographic software library developed by the OpenBSD project and an open source implementation of the Secure Sockets Layer SSL and Transport Layer Security TLS protocols. A double-release vulnerability exists in the 'sslparseclienthellousesrtpext' function in...

openssl: DTLS packet processing double free

A flaw was discovered in the way OpenSSL handled DTLS packets. A remote attacker could use this flaw to cause a DTLS server or client using OpenSSL to crash or use excessive amounts of memory...

openssl: DoS when sending invalid DTLS handshake

A denial of service flaw was found in the way OpenSSL handled certain DTLS ServerHello requests. A specially crafted DTLS handshake packet could cause a DTLS client using OpenSSL to crash...

openssl: DTLS memory exhaustion

A flaw was discovered in the way OpenSSL handled DTLS packets. A remote attacker could use this flaw to cause a DTLS server or client using OpenSSL to crash or use excessive amounts of memory...

OpenSSL DTLS Fragment Buffer Overflow DoS Exploit

This module performs a Denial of Service Attack against Datagram TLS in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h. This occurs when a DTLS ClientHello message has multiple fragments and the fragment lengths of later fragments are larger than that of the first, a buffer...

OpenSSL DTLS Fragment Buffer Overflow DoS

This module performs a Denial of Service Attack against Datagram TLS in OpenSSL before 0.9.8za, 1.0.0 before 1.0.0m, and 1.0.1 before 1.0.1h. This occurs when a DTLS ClientHello message has multiple fragments and the fragment lengths of later fragments are larger than that of the first, a buffer...

openssl: DoS when sending invalid DTLS handshake

A denial of service flaw was found in the way OpenSSL handled certain DTLS ServerHello requests. A specially crafted DTLS handshake packet could cause a DTLS client using OpenSSL to crash...

openssl: DoS when sending invalid DTLS handshake

A denial of service flaw was found in the way OpenSSL handled certain DTLS ServerHello requests. A specially crafted DTLS handshake packet could cause a DTLS client using OpenSSL to crash...

Theoretical Lucky Thirteen TLS Attacks Could Turn Practical

For now, the Lucky Thirteen attacks described in a paper last week by researchers at Royal Holloway, University of London, are largely theoretical. But the potential exists to adapt techniques used in the BEAST attacks against TLS/SSL to improve the feasibility of Lucky Thirteen, a researcher sai...