medium
5.8
CWE
693
Advisory Published

cisco-sa-http-fp-bp-KfDdcQhc: Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerabilities

First published: Wed Apr 28 2021(Updated: )

Multiple Cisco products are affected by vulnerabilities in the Snort detection engine that could allow an unauthenticated, remote attacker to bypass a configured file policy for HTTP. These vulnerabilities are due to incorrect handling of specific HTTP header parameters. An attacker could exploit these vulnerabilities by sending crafted HTTP packets through an affected device. A successful exploit could allow the attacker to bypass a configured file policy for HTTP packets and deliver a malicious payload. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc

Credit: These vulnerabilities were found by Santosh Krishnamurthy Cisco during internal security testing

Affected SoftwareAffected VersionHow to fix
Cisco FTD Software>=6.5.0<=6.6.0<6.6.42>=Earlier than 6.2.2=6.2.2=6.2.3=6.3.0<=6.4.0<6.4.0.12
6.6.42
6.4.0.12
Cisco UTD Snort IPS Engine Software for IOS XE=17.4<17.4.1>=17.1=17.2<=17.3<17.3.3>=.12<16<=16.12<16.12.5
17.4.1
17.3.3
16.12.5
Cisco UTD Engine for IOS XE SD-WAN Software1=17.4<17.4.1>=17.1=17.2<=17.3<17.3.3>=.12<16<=16.12<16.12.5
17.4.1
17.3.3
16.12.5

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is cisco-sa-http-fp-bp-KfDdcQhc.

  • What products are affected by this vulnerability?

    Multiple Cisco products are affected including FTD Software, UTD Snort IPS Engine Software for IOS XE, and UTD Engine for IOS XE SD-WAN Software1.

  • How severe is this vulnerability?

    The severity of this vulnerability is medium with a severity value of 5.8.

  • How can an attacker exploit this vulnerability?

    An attacker can exploit this vulnerability by bypassing a configured file policy for HTTP using specific HTTP header parameters.

  • Where can I find more information about this vulnerability?

    You can find more information about this vulnerability on the Cisco Security Advisory website.

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