CVE-2020-3315: Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability

Published May 6, 2020
·
Updated

Multiple Cisco products are affected by a vulnerability in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass the configured file policies on an affected system. The vulnerability is due to errors in how the Snort detection engine handles specific HTTP responses. An attacker could exploit this vulnerability by sending crafted HTTP packets that would flow through an affected system. A successful exploit could allow the attacker to bypass the configured file policies and deliver a malicious payload to the protected network.

Affected Software

47 affected componentsFixes available
debian/snort<=2.9.7.0-5, <=2.9.15.1-5, <=2.9.15.1-6
2.9.20-0+deb10u12.9.20-0+deb11u1
Cisco FirePOWER Management Center=2.9.14.4
Cisco FirePOWER Management Center=2.9.15
Cisco FirePOWER Management Center=2.9.16
Cisco Firepower Threat Defense<6.6.0
Cisco IOS=15.2\(7\)e
Cisco IOS=16.11.2
Cisco IOS=17.3.1
Cisco 1100-4g Integrated Services Router
Cisco 1100-6g Integrated Services Router
Cisco 1100-lte Integrated Services Router
Cisco 1101 Integrated Services Router
Cisco 1109 Integrated Services Router
Cisco 1111x Integrated Services Router
Cisco 111x Integrated Services Router
Cisco 1120 Integrated Services Router
Cisco 1160 Integrated Services Router
Cisco 4221 Integrated Services Router
Cisco 4331 Integrated Services Router
Cisco 4431 Integrated Services Router
Cisco 4461 Integrated Services Router
Cisco Csr1000v
Cisco Isa-3000-2c2f-k9
Cisco Isa-3000-4c-k9
Cisco Secure Firewall Management Center=2.9.14.4
Cisco Secure Firewall Management Center=2.9.15
Cisco Secure Firewall Management Center=2.9.16
Cisco Secure Firewall Threat Defense<6.6.0
All of the following
Any of the following
Cisco IOS=15.2\(7\)e
Cisco IOS=16.11.2
Cisco IOS=17.3.1
Any of the following
Cisco 1100-4g Integrated Services Router
Cisco 1100-6g Integrated Services Router
Cisco 1100-lte Integrated Services Router
Cisco 1101 Integrated Services Router
Cisco 1109 Integrated Services Router
Cisco 1111x Integrated Services Router
Cisco 111x Integrated Services Router
Cisco 1120 Integrated Services Router
Cisco 1160 Integrated Services Router
Cisco 4221 Integrated Services Router
Cisco 4331 Integrated Services Router
Cisco 4431 Integrated Services Router
Cisco 4461 Integrated Services Router
Cisco Csr1000v
Cisco Isa-3000-2c2f-k9
Cisco Isa-3000-4c-k9

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/snort to a version that resolves this vulnerability.

    Fixed in 2.9.20-0+deb10u1Fixed in 2.9.20-0+deb11u1

Event History

May 6, 2020
CVE Published
via MITRE·04:40 PM
Data Sourced
via MITRE·04:40 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:15 PM
DescriptionSeverityWeaknessAffected Software
Oct 4, 2022
Data Sourced
07:54 PM
SeverityAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2020-3315?

CVE-2020-3315 has been classified as a high severity vulnerability due to its potential to allow unauthorized access to bypass file policies.

2

How do I fix CVE-2020-3315?

To fix CVE-2020-3315, you should upgrade to the latest version of the affected Cisco products or apply any available patches.

3

Which Cisco products are affected by CVE-2020-3315?

CVE-2020-3315 affects multiple Cisco products including Snort, Cisco Firepower Management Center, and Cisco IOS versions listed in the vulnerability details.

4

What type of attacks can CVE-2020-3315 enable?

CVE-2020-3315 can enable unauthenticated remote attackers to bypass configured file policies on the affected systems.

5

Is there a workaround for CVE-2020-3315?

While the primary mitigation for CVE-2020-3315 is to update systems, reviewing and tightening access controls may serve as a temporary workaround.

Contact

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