CVE-2020-3315: Multiple Cisco Products Snort HTTP Detection Engine File Policy Bypass Vulnerability
First published: Wed May 06 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.
Credit: ykramarz@cisco.com ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/snort | <=2.9.7.0-5<=2.9.15.1-5<=2.9.15.1-6 | 2.9.20-0+deb10u1 2.9.20-0+deb11u1 |
| Cisco Firepower Threat Defense (FTD) | <6.6.0 | |
| 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 | |
| All of | ||
| Any of | ||
| Cisco IOS | =15.2\(7\)e | |
| Cisco IOS | =16.11.2 | |
| Cisco IOS | =17.3.1 | |
| Any of | ||
| Cisco 1100-4g/6g Integrated Services Router | ||
| Cisco 1100 Integrated Services Router | ||
| Cisco 1100 Integrated Services Router | ||
| Cisco IR 1101 | ||
| Cisco 1109 Integrated Services Router | ||
| Cisco 111x 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/k9-rf Integrated Services Router | ||
| Cisco 4431 Integrated Services Router | ||
| Cisco 4441 Integrated Services Router | ||
| Cisco Cloud Services Router 1000V | ||
| Cisco ISA 3000 | ||
| Cisco ISA 3000-4C-K9 | ||
| Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software | =2.9.14.4 | |
| Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software | =2.9.15 | |
| Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software | =2.9.16 | |
| Cisco IOS | =15.2\(7\)e | |
| Cisco IOS | =16.11.2 | |
| Cisco IOS | =17.3.1 | |
| Cisco 1100-4g/6g Integrated Services Router | ||
| Cisco 1100 Integrated Services Router | ||
| Cisco 1100 Integrated Services Router | ||
| Cisco IR 1101 | ||
| Cisco 1109 Integrated Services Router | ||
| Cisco 111x 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/k9-rf Integrated Services Router | ||
| Cisco 4431 Integrated Services Router | ||
| Cisco 4441 Integrated Services Router | ||
| Cisco Cloud Services Router 1000V | ||
| Cisco ISA 3000 | ||
| Cisco ISA 3000-4C-K9 |
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2020-3315
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort_filepolbypass-m4X5DgOP
- https://security-tracker.debian.org/tracker/CVE-2021-1223
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-filepolbypass-67DEwMe2
- https://security-tracker.debian.org/tracker/CVE-2021-1224
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-tfo-bypass-MmzZrtes
- https://security-tracker.debian.org/tracker/CVE-2021-1494
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-http-fp-bp-KfDdcQhc
- https://security-tracker.debian.org/tracker/CVE-2021-1495
- https://security-tracker.debian.org/tracker/CVE-2021-34749
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sni-data-exfil-mFgzXqLN
- https://security-tracker.debian.org/tracker/CVE-2021-40114
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-s2R7W9UU
- https://www.cve.org/CVERecord?id=CVE-2020-3315
- https://www.cve.org/CVERecord?id=CVE-2021-1223
- https://www.cve.org/CVERecord?id=CVE-2021-1224
- https://www.cve.org/CVERecord?id=CVE-2021-1494
- https://www.cve.org/CVERecord?id=CVE-2021-1495
- https://www.cve.org/CVERecord?id=CVE-2021-34749
- https://www.cve.org/CVERecord?id=CVE-2021-40114
- https://udd.debian.org/lintian/?packages=snort
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1021276
- https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
- https://www.debian.org/security/2023/dsa-5354
Frequently Asked Questions
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.
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.
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.
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.
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.
- collector/debian-bugs
- alias/CVE-2020-3315
- collector/security-tracker-debian
- agent/references
- agent/weakness
- agent/type
- agent/severity
- agent/title
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/first-publish-date
- agent/last-modified-date
- agent/author
- agent/event
- agent/source
- agent/tags
- agent/softwarecombine
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- collector/nvd-index
- package-manager/debian
- vendor/cisco
- canonical/cisco firepower threat defense (ftd)
- canonical/cisco secure firewall management center
- version/cisco secure firewall management center/2.9.14.4
- version/cisco secure firewall management center/2.9.15
- version/cisco secure firewall management center/2.9.16
- canonical/cisco ios
- version/cisco ios/15.2\(7\)e
- version/cisco ios/16.11.2
- version/cisco ios/17.3.1
- canonical/cisco 1100-4g/6g integrated services router
- canonical/cisco 1100 integrated services router
- canonical/cisco ir 1101
- canonical/cisco 1109 integrated services router
- canonical/cisco 111x integrated services router
- canonical/cisco 1120 integrated services router
- canonical/cisco 1160 integrated services router
- canonical/cisco 4221 integrated services router
- canonical/cisco 4331/k9-rf integrated services router
- canonical/cisco 4431 integrated services router
- canonical/cisco 4441 integrated services router
- canonical/cisco cloud services router 1000v
- canonical/cisco isa 3000
- canonical/cisco isa 3000-4c-k9
- canonical/cisco firepower management center (fmc) and firepower threat defense (ftd) software
- version/cisco firepower management center (fmc) and firepower threat defense (ftd) software/2.9.14.4
- version/cisco firepower management center (fmc) and firepower threat defense (ftd) software/2.9.15
- version/cisco firepower management center (fmc) and firepower threat defense (ftd) software/2.9.16