The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote attackers to cause a denial of service (delays of legitimate traffic) via crafted packet data that requires excessive evaluation time within the packet classification algorithm for the MegaFlow cache, aka a Tuple Space Explosion (TSE) attack.

The remote Redhat Enterprise Linux 7 host has one or more packages installed that are affected by multiple vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - dpdk: librte_vhost Integer truncation in vhost_user_check_and_alloc_queue_pair() (CVE-2020-10723)

  - openvswitch: Integer Underflow in Organization Specific TLV (CVE-2022-4338)

  - The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote     attackers to cause a denial of service (delays of legitimate traffic) via crafted packet data that     requires excessive evaluation time within the packet classification algorithm for the MegaFlow cache, aka     a Tuple Space Explosion (TSE) attack. (CVE-2019-25076)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package is installed.

This plugin has been deprecated as it does not adhere to established standards for this style of check.

The version of openvswitch installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2019-25076 advisory.

  - The TSS (Tuple Space Search) algorithm in Open vSwitch 2.x through 2.17.2 and 3.0.0 allows remote     attackers to cause a denial of service (delays of legitimate traffic) via crafted packet data that     requires excessive evaluation time within the packet classification algorithm for the MegaFlow cache, aka     a Tuple Space Explosion (TSE) attack. (CVE-2019-25076)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
199866	RHEL 7 : openvswitch (Unpatched Vulnerability)	Nessus	Red Hat Local Security Checks	critical
195853	RHEL 8 : openvswitch (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
195808	RHEL 7 : openvswitch (Unpatched Vulnerability) (deprecated)	Nessus	Red Hat Local Security Checks	critical
173515	CBL Mariner 2.0 Security Update: openvswitch (CVE-2019-25076)	Nessus	MarinerOS Local Security Checks	medium

Detections

Analytics

CVE-2019-25076

medium

Tenable Plugins

critical

critical

critical

medium