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CVE-2016-3645 : Détail

CVE-2016-3645

9.8
/
CRITICAL
4.76%V3
Network
2016-06-30 21:00 +00:00
2017-09-02 07:57 +00:00
CVE.org
NVD

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Descriptions

Integer overflow in the TNEF unpacker in the AntiVirus Decomposer engine in Symantec Advanced Threat Protection (ATP); Symantec Data Center Security:Server (SDCS:S) 6.x through 6.6 MP1; Symantec Web Gateway; Symantec Endpoint Protection (SEP) before 12.1 RU6 MP5; Symantec Endpoint Protection (SEP) for Mac; Symantec Endpoint Protection (SEP) for Linux before 12.1 RU6 MP5; Symantec Protection Engine (SPE) before 7.0.5 HF01, 7.5.x before 7.5.3 HF03, 7.5.4 before HF01, and 7.8.0 before HF01; Symantec Protection for SharePoint Servers (SPSS) 6.0.3 through 6.0.5 before 6.0.5 HF 1.5 and 6.0.6 before HF 1.6; Symantec Mail Security for Microsoft Exchange (SMSMSE) before 7.0_3966002 HF1.1 and 7.5.x before 7.5_3966008 VHF1.2; Symantec Mail Security for Domino (SMSDOM) before 8.0.9 HF1.1 and 8.1.x before 8.1.3 HF1.2; CSAPI before 10.0.4 HF01; Symantec Message Gateway (SMG) before 10.6.1-4; Symantec Message Gateway for Service Providers (SMG-SP) 10.5 before patch 254 and 10.6 before patch 253; Norton AntiVirus, Norton Security, Norton Internet Security, and Norton 360 before NGC 22.7; Norton Security for Mac before 13.0.2; Norton Power Eraser (NPE) before 5.1; and Norton Bootable Removal Tool (NBRT) before 2016.1 allows remote attackers to have an unspecified impact via crafted TNEF data.

Informations

Faiblesses connexes

CWE-ID Nom de la faiblesse Source
CWE-189 Category : Numeric Errors
Weaknesses in this category are related to improper calculation or conversion of numbers.

Metrics

Metric Score Sévérité CVSS Vecteur Source
V3.0 9.8 CRITICAL CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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.

Unchanged

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

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.

EPSS Score

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.

EPSS Percentile

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 : 40035

Date de publication : 2016-06-28 22:00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=819 Simple fuzzing found an integer overflow in the dec2tnef library. This allocation from Attachment::setDataFromAttachment() doesn't verify that the attacker controlled value doesn't wrap: .text:000227B8 8D 42 01 lea eax, [edx+1] .text:000227BB 89 85 68 FF FF+ mov [ebp+var_98], eax .text:000227C1 8B 83 CC FF FF+ mov eax, ds:(_ZSt7nothrow_ptr - 42CFCh)[ebx] .text:000227C7 89 44 24 04 mov [esp+4], eax .text:000227CB 8B 85 68 FF FF+ mov eax, [ebp+var_98] .text:000227D1 C1 E0 02 shl eax, 2 .text:000227D4 89 04 24 mov [esp], eax .text:000227D7 89 95 5C FF FF+ mov [ebp+src], edx .text:000227DD 89 8D 58 FF FF+ mov [ebp+var_A8], ecx .text:000227E3 E8 54 22 FE FF call __ZnajRKSt9nothrow_t ; operator new[](uint,std::nothrow_t const&) That's (count + 1) * 4, without any checking that will succeed. The attached testcase reaches this code on Symantec Scan Engine, I'm not sure which other products use this code. (gdb) bt #1 0x07e88816 in Attachment::setDataFromAttachment(Item&) () from definitions/Decomposer/libdec2tnef.so #2 0x07e88abc in Attachment::setAttribute(Item&) () from definitions/Decomposer/libdec2tnef.so #3 0x07e8a1b4 in TNEFObject::getAttachments(_IO_FILE*, MList&) () from definitions/Decomposer/libdec2tnef.so #4 0x07e6c1d6 in CTNEFArchive::Open(char const*) () from definitions/Decomposer/libdec2tnef.so #5 0x07e6ae5f in CTNEFEngine::OpenArchive(CTNEFArchive*, bool*) () from definitions/Decomposer/libdec2tnef.so #6 0x07e6b8c0 in CTNEFEngine::Process(IDecomposerEx*, IDecContainerObjectEx*, IDecEventSink*, unsigned short*, char*, bool*, bool*) () from definitions/Decomposer/libdec2tnef.so #7 0x063d07b5 in CDecomposer::DecProcess(IDecObject*, IDecEventSink*, IDecIOCB*, unsigned short*, char*) () #8 0x063d13cb in CDecomposer::Process(IDecObject*, IDecEventSink*, IDecIOCB*, unsigned short*, char*) () Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/40035.zip

Products Mentioned

Configuraton 0

Symantec>>Norton_security >> Version To (including) 13.0.1

Configuraton 0

Symantec>>Protection_engine >> Version From (including) 7.0.0 To (including) 7.0.5

Symantec>>Protection_engine >> Version From (including) 7.5.0 To (including) 7.5.4

Symantec>>Protection_engine >> Version 7.8.0

Configuraton 0

Symantec>>Advanced_threat_protection >> Version To (including) 2.0.3

Configuraton 0

Symantec>>Norton_bootable_removal_tool >> Version To (including) 2016.0

Configuraton 0

Symantec>>Data_center_security_server >> Version 6.0

Symantec>>Data_center_security_server >> Version 6.0

Symantec>>Data_center_security_server >> Version 6.5

Symantec>>Data_center_security_server >> Version 6.5

Symantec>>Data_center_security_server >> Version 6.6

Symantec>>Data_center_security_server >> Version 6.6

Configuraton 0

Symantec>>Protection_for_sharepoint_servers >> Version From (including) 6.0 To (including) 6.0.6

Symantec>>Protection_for_sharepoint_servers >> Version From (including) 6.03 To (including) 6.05

Configuraton 0

Symantec>>Message_gateway_for_service_providers >> Version 10.5

Symantec>>Message_gateway_for_service_providers >> Version 10.6

Configuraton 0

Symantec>>Csapi >> Version To (including) 10.0.4

Configuraton 0

Symantec>>Endpoint_protection >> Version 12.1.6

Symantec>>Endpoint_protection >> Version 12.1.6

Symantec>>Endpoint_protection >> Version 12.1.6

Symantec>>Endpoint_protection >> Version 12.1.6

Symantec>>Endpoint_protection >> Version 12.1.6

Symantec>>Endpoint_protection >> Version 12.1.6

Symantec>>Endpoint_protection >> Version 12.1.6

Configuraton 0

Symantec>>Norton_power_eraser >> Version To (including) 5.0

Configuraton 0

Symantec>>Mail_security_for_domino >> Version From (including) 8.0 To (including) 8.0.9

Symantec>>Mail_security_for_domino >> Version From (including) 8.1 To (including) 8.1.3

Configuraton 0

Symantec>>Mail_security_for_microsoft_exchange >> Version From (including) 7.0 To (including) 7.0.4

Symantec>>Mail_security_for_microsoft_exchange >> Version From (including) 7.5 To (including) 7.5.4

Symantec>>Mail_security_for_microsoft_exchange >> Version 6.5.8

Configuraton 0

Symantec>>Message_gateway >> Version To (including) 10.6.1-3

Configuraton 0

Symantec>>Norton_360 >> Version *

Symantec>>Norton_antivirus >> Version *

Symantec>>Norton_internet_security >> Version *

Symantec>>Norton_security >> Version *

Symantec>>Norton_security_with_backup >> Version *

Symantec>>Ngc >> Version To (including) 22.6

References

http://www.securitytracker.com/id/1036199
Tags : vdb-entry, x_refsource_SECTRACK
http://www.securitytracker.com/id/1036198
Tags : vdb-entry, x_refsource_SECTRACK
https://www.exploit-db.com/exploits/40035/
Tags : exploit, x_refsource_EXPLOIT-DB
http://www.securityfocus.com/bid/91439
Tags : vdb-entry, x_refsource_BID

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