The State of State Machines

Posted by Natalie Silvanovich, Project Zero On January 29, 2019, a serious vulnerability was discovered in Group FaceTime which allowed an attacker to call a target and force the call to connect without user interaction from the target, allowing the attacker to listen to the target’s surroundings...

Denial Of Service (DoS)

opensmtpd is vulnerable to denial of service. The smtpd/lkafilter.c, in certain configurations, allows remote attackers to cause a denial of service via a NULL pointer dereference and daemon crash using a malicious pattern of client activity as the filter state machine does not properly maintain...

CVE-2020-35680

smtpd/lkafilter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service NULL pointer dereference and daemon crash via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between th...

ALPINE-CVE-2020-35680

smtpd/lkafilter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service NULL pointer dereference and daemon crash via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between th...

Null pointer dereference

smtpd/lkafilter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service NULL pointer dereference and daemon crash via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between th...

CVE-2020-35680

smtpd/lkafilter.c in OpenSMTPD before 6.8.0p1, in certain configurations, allows remote attackers to cause a denial of service NULL pointer dereference and daemon crash via a crafted pattern of client activity, because the filter state machine does not properly maintain the I/O channel between th...

CVE-2020-27024

In smpbrstatemachineevent of smpbrmain.cc, there is a possible out of bounds read due to a missing bounds check. This could lead to remote information disclosure triggered by a malformed Bluetooth packet, with no additional execution privileges needed. User interaction is not needed for...

nss: TLS 1.3 HelloRetryRequest downgrade request sets client into invalid state

A protocol downgrade flaw was found in Network Security Services NSS. After a HelloRetryRequest has been sent, the client may negotiate a lower protocol than TLS 1.3, resulting in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming Application Data...

wolfSSL Information Disclosure Vulnerability (CNVD-2020-49929)

wolfSSL formerly known as CyaSSL is the United States wolfSSL company for embedded systems developers to use a small, portable embedded SSL programming library. An information disclosure vulnerability exists in wolfSSL versions prior to 4.5.0. The vulnerability is related to a buggy implementatio...

Ubuntu: Security Advisory (USN-4397-1)

The remote host is missing an update for the SPDX-FileCopyrightText: 2020 Greenbone AG Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-only ifdescription...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : NSS vulnerabilities (USN-4397-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4397-1 advisory. It was discovered that NSS incorrectly handled the TLS State Machine. A remote attacker could possibly use this issue to cause NS...

USN-4397-1: NSS vulnerabilities

It was discovered that NSS incorrectly handled the TLS State Machine. A remote attacker could possibly use this issue to cause NSS to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10. CVE-2019-17023 Cesar Pereida Garcia discovered that NSS...

USN-4397-1 nss vulnerabilities

It was discovered that NSS incorrectly handled the TLS State Machine. A remote attacker could possibly use this issue to cause NSS to hang, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10. CVE-2019-17023 Cesar Pereida Garcia discovered that NSS...

Cisco IOS and IOS XE Denial of Service Vulnerability (CNVD-2020-31826)

Cisco IOS and IOS XE are a set of operating systems developed by Cisco for its network devices. A security vulnerability exists in the Secure Shell SSH server code in Cisco IOS Software and Cisco IOS XE Software, which stems from the SSH state machine not properly representing internal state. An...

CVE-2020-3200

A vulnerability in the Secure Shell SSH server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which...

CVE-2020-3200: Interpretation Conflict

A vulnerability in the Secure Shell SSH server code of Cisco IOS Software and Cisco IOS XE Software could allow an authenticated, remote attacker to cause an affected device to reload. The vulnerability is due to an internal state not being represented correctly in the SSH state machine, which...

CVE-2019-17060

The Bluetooth Low Energy BLE stack implementation on the NXP KW41Z based on the MCUXpresso SDK with Bluetooth Low Energy Driver 2.2.1 and earlier does not properly restrict the BLE Link Layer header and executes certain memory contents upon receiving a packet with a Link Layer ID LLID equal to...

UBUNTU-CVE-2019-17023

After a HelloRetryRequest has been sent, the client may negotiate a lower protocol that TLS 1.3, resulting in an invalid state transition in the TLS State Machine. If the client gets into this state, incoming Application Data records will be ignored. This vulnerability affects Firefox 72...

Security Vulnerabilities fixed in Firefox 72 — Mozilla

During the initialization of a new content process, a pointer offset can be manipulated leading to memory corruption and a potentially exploitable crash in the parent process. Note: this issue only occurs on Windows. Other operating systems are unaffected. When pasting a Due to a missing case...

Unspecified vulnerability in ShapeShift KeepKey finite state machine

ShapeShift KeepKey is an e-wallet device for cryptocurrency storage. An unspecified vulnerability exists in the ShapeShift KeepKey finite state machine, which stems from the program not being sufficiently authenticated. The vulnerability can be exploited to reset a portion of the encryption key t...