Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it is contained at least partially within the TFO connection handshake. An attacker could exploit this vulnerability by sending crafted TFO packets with an HTTP payload through an affected device. A successful exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious payload.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Multiple Cisco products are affected by a vulnerability with TCP Fast Open (TFO) when used in conjunction     with the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a     configured file policy for HTTP. The vulnerability is due to incorrect detection of the HTTP payload if it     is contained at least partially within the TFO connection handshake. An attacker could exploit this     vulnerability by sending crafted TFO packets with an HTTP payload through an affected device. A successful     exploit could allow the attacker to bypass configured file policy for HTTP packets and deliver a malicious     payload. (CVE-2021-1224)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5354 advisory.

    Multiple security vulnerabilities were discovered in snort, a flexible Network Intrusion Detection System,     which could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition or     bypass filtering technology on an affected device and ex-filtrate data from a compromised host. For the     stable distribution (bullseye), these problems have been fixed in version 2.9.20-0+deb11u1. We recommend     that you upgrade your snort packages. For the detailed security status of snort please refer to its     security tracker page at: https://security-tracker.debian.org/tracker/snort

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3317 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-3317-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                      Markus Koschany     February 11, 2023                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : snort     Version        : 2.9.20-0+deb10u1     CVE ID         : CVE-2020-3299 CVE-2020-3315 CVE-2021-1223 CVE-2021-1224                      CVE-2021-1236 CVE-2021-1494 CVE-2021-1495 CVE-2021-34749                      CVE-2021-40114     Debian Bug     : 1021276

    Multiple security vulnerabilities were discovered in snort, a flexible Network     Intrusion Detection System, which could allow an unauthenticated, remote     attacker to cause a denial of service (DoS) condition or bypass filtering     technology on an affected device and ex-filtrate data from a compromised host.

    For Debian 10 buster, these problems have been fixed in version     2.9.20-0+deb10u1.

    We recommend that you upgrade your snort packages.

    For the detailed security status of snort please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/snort

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: This is a digitally signed message part

Tenable has extracted the preceding description block directly from the Debian security advisory.

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

ID	Name	Product	Family	Severity
262590	Linux Distros Unpatched Vulnerability : CVE-2021-1224	Nessus	Misc.	medium
171628	Debian DSA-5354-1 : snort - security update	Nessus	Debian Local Security Checks	high
171378	Debian dla-3317 : snort - security update	Nessus	Debian Local Security Checks	high

Detections

Analytics

CVE-2021-1224

medium

Tenable Plugins

medium

high

high