The vulnerability of the Unidirectional Link Detection function in operating systems such as NX-OS, FXOS, Cisco IOS XE, and Cisco IOS XR arises from insufficient input data validation. This allows attackers to trigger service interruptions.

The vulnerability of the Unidirectional Link Detection function in operating systems such as NX-OS, FXOS, Cisco IOS XE, and Cisco IOS XR is related to insufficient validation of input data. Exploiting this vulnerability can allow a malicious actor to cause service failures remotely...

CVE-2021-34714

CVE-2021-34714 affects Cisco FXOS, IOS, IOS XE/XR, and NX-OS UDLD implementations. The root cause is improper input validation of UDLD packets, enabling an unauthenticated, adjacent attacker to trigger a device reload and DoS; on IOS XR the impact is limited to reloading the UDLD process. The vul...

PT-2021-4497 · Cisco · Cisco Fxos +5

Name of the Vulnerable Software and Affected Versions: Cisco FXOS Software affected versions not specified Cisco IOS Software affected versions not specified Cisco IOS XE Software affected versions not specified Cisco IOS XR Software affected versions not specified Cisco NX-OS Software affected...

Security Bulletin: Vulnerability in NX-OS Firmware used by IBM c-type SAN directors and switches.

Summary Public disclosed OpenSSL vulnerability in NX-OS Firmware used by IBM c-type SAN directors and switches. Vulnerability Details CVEID: CVE-2021-23839 DESCRIPTION: OpenSSL could provide weaker than expected security, caused by incorrect SSLv2 rollback protection that allows for the inversion...

Cisco NX-OS Software VXLAN OAM DoS (cisco-sa-nxos-ngoam-dos-LTDb9Hv)

A denial of service DoS vulnerability exists in the VXLAN Operation, Administration, and Maintenance OAM feature of Cisco NX-OS Software, known as NGOAM, due to an improper handling of specific packets with a Transparent Interconnection of Lots of Links TRILL OAM EtherType. An unauthenticated,...

Cisco NX-OS Software Denial of Service Vulnerability (CNVD-2021-68723)

A denial-of-service vulnerability exists in the MPLS OAM feature of Cisco NX-OS Software, which can be exploited by an attacker by sending malicious MPLS echo requests or echo reply packets to cause the MPLS OAM process to crash and restart multiple times...

Vulnerabilities fixed in Cisco NX-OS

Vulnerabilities have been fixed in Cisco NX-OS. A malicious person could potentially exploit the vulnerabilities to cause a denial-of-service cause. Both vulnerabilities are not exploitable with standard configuration. exploited. For the vulnerability with CVE attribute CVE-2021-1588 requires tha...

Cisco NX-OS Software Denial of Service Vulnerability (CNVD-2021-68721)

Cisco NX-OS Software is a set of data center-class operating system software for switches from Cisco, U.S. A denial-of-service vulnerability exists in the VXLAN OAM feature of Cisco NX-OS Software, which can be exploited by attackers by sending specially crafted packets to cause high device CPU...

Cisco NX-OS Software Denial of Service Vulnerability (CNVD-2021-68727)

Cisco NX-OS Software is a set of data center-class operating system software for switches from Cisco, U.S. A denial-of-service vulnerability exists in the implementation of the system login block-for command in Cisco NX-OS Software, which could be exploited by an attacker to log into a process by...

Cisco Issues Critical Fixes for High-End Nexus Gear

Cisco Systems released six security patches tied to its high-end 9000 series networking gear ranging in importance from critical, high and medium severity. The most serious of the bugs patched by Cisco rated 9.1 out of 10 could allow a remote and unauthenticated adversary to read or write arbitra...

CVE-2021-1590

A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service DoS condition. This vulnerability is due to a logic error in the...

CVE-2021-1588

A vulnerability in the MPLS Operation, Administration, and Maintenance OAM feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper input validation when an affected devi...

CVE-2021-1588

A vulnerability in the MPLS Operation, Administration, and Maintenance OAM feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper input validation when an affected devi...

CVE-2021-1587

A vulnerability in the VXLAN Operation, Administration, and Maintenance OAM feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper handling of specific...

CVE-2021-1590

A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service DoS condition. This vulnerability is due to a logic error in the...

Input validation

A vulnerability in the MPLS Operation, Administration, and Maintenance OAM feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a denial of service DoS condition on an affected device. This vulnerability is due to improper input validation when an affected devi...

Race condition

A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service DoS condition. This vulnerability is due to a logic error in the...

CVE-2021-1590 Cisco NX-OS Software system login block-for Denial of Service Vulnerability

A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service DoS condition. This vulnerability is due to a logic error in the...

CVE-2021-1590

Cisco NX-OS Software is affected by CVE-2021-1590 due to a logic error in the system login block-for command when an attack is detected. An unauthenticated, remote attacker could perform a brute-force login attack and cause the login process to restart or reload, resulting in a denial-of-service ...

CVE-2021-1590 Cisco NX-OS Software system login block-for Denial of Service Vulnerability

A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service DoS condition. This vulnerability is due to a logic error in the...