5.8
MEDIUM CVSS 3.1
CVE-2020-3299
Cisco Snort Chunked Response HTTP File Policy Bypass
Description

Multiple Cisco products are affected by a vulnerability in 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 modified HTTP packets used in chunked responses. An attacker could exploit this vulnerability 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.

INFO

Published Date :

Oct. 21, 2020, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 5:30 a.m.

Remotely Exploit :

Yes !
Affected Products

The following products are affected by CVE-2020-3299 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cisco firepower_threat_defense
2 Cisco meraki_mx
3 Cisco 4221_integrated_services_router
4 Cisco 4331_integrated_services_router
5 Cisco 4431_integrated_services_router
6 Cisco 4461_integrated_services_router
7 Cisco 1100-4p
8 Cisco 1100-8p
9 Cisco 1101-4p
10 Cisco 1109-2p
11 Cisco 1109-4p
12 Cisco 1111x-8p
13 Cisco isa_3000
14 Cisco cloud_services_router_1000v
15 Cisco isrv
1 Snort snort
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 2.0 MEDIUM [email protected]
CVSS 3.0 MEDIUM [email protected]
CVSS 3.1 MEDIUM [email protected]
Solution
Update the affected product to address a vulnerability in the Snort detection engine.
  • Upgrade the Snort packages.
  • Upgrade to a fixed version.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2020-3299 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2020-3299 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2020-3299 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2020-3299 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html
    Added Reference https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-bypass-3eCfd24j
    Added Reference https://www.debian.org/security/2023/dsa-5354
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CPE Deprecation Remap by [email protected]

    May. 22, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr_4331:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4331_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 22, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr_4221:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4221_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 22, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr_4431:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4431_integrated_services_router:-:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    May. 22, 2023

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:h:cisco:isr_4461:-:*:*:*:*:*:*:* OR *cpe:2.3:h:cisco:4461_integrated_services_router:-:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Feb. 19, 2023

    Action Type Old Value New Value
    Added Reference https://www.debian.org/security/2023/dsa-5354 [No Types Assigned]
  • CVE Modified by [email protected]

    Feb. 11, 2023

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2023/02/msg00011.html [No Types Assigned]
  • Initial Analysis by [email protected]

    Oct. 27, 2020

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
    Changed Reference Type https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-bypass-3eCfd24j No Types Assigned https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-bypass-3eCfd24j Vendor Advisory
    Added CWE NIST NVD-CWE-Other
    Added CPE Configuration AND OR *cpe:2.3:a:cisco:firepower_threat_defense:*:*:*:*:*:*:*:* versions from (including) 6.0.0 up to (excluding) 6.3.0.1 OR cpe:2.3:a:cisco:cloud_services_router_1000v:-:*:*:*:*:*:*:* cpe:2.3:a:cisco:isrv:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:1100-4p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:1100-8p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:1101-4p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:1109-2p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:1109-4p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:1111x-8p:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isa_3000:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr_4221:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr_4331:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr_4431:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:isr_4461:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:meraki_mx:-:*:*:*:*:*:*:*
    Added CPE Configuration OR *cpe:2.3:a:snort:snort:*:*:*:*:*:*:*:* versions up to (excluding) 2.9.13.1
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 5.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Base CVSS Score: 5
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.29 }} -0.10%

score

0.52202

percentile