VDB-110708 · CVE-2017-11397 · GCVE-0-2017-11397

Trend Micro Encryption for Email up to 5.6 DLL Preloader untrusted search path

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.5	$5k-$25k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Trend Micro Encryption for Email up to 5.6. This issue affects some unknown processing of the component DLL Preloader. Such manipulation leads to untrusted search path. This vulnerability is listed as CVE-2017-11397. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Trend Micro Encryption for Email up to 5.6. It has been rated as critical. Affected by this issue is an unknown part of the component DLL Preloader. The manipulation with an unknown input leads to a untrusted search path vulnerability. Using CWE to declare the problem leads to CWE-426. The product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A service DLL preloading vulnerability in Trend Micro Encryption for Email versions 5.6 and below could allow an unauthenticated remote attacker to execute arbitrary code on a vulnerable system.

The bug was discovered 11/17/2017. The weakness was presented 12/16/2017 (Website). The advisory is shared for download at success.trendmicro.com. This vulnerability is handled as CVE-2017-11397 since 07/17/2017. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 12/15/2019). The MITRE ATT&CK project declares the attack technique as T1574.

The vulnerability was handled as a non-public zero-day exploit for at least 28 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Trend Micro

Name

Encryption for Email

Version

License

commercial

Website

Vendor: https://www.trendmicro.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Untrusted search path
CWE: CWE-426
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/17/2017 🔍
11/17/2017 +123 days 🔍
12/15/2017 +28 days 🔍
12/16/2017 +1 days 🔍
12/16/2017 +0 days 🔍
12/15/2019 +729 days 🔍

Sourcesinfo

Vendor: trendmicro.com

Advisory: success.trendmicro.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-11397 (🔍)
GCVE (CVE): GCVE-0-2017-11397
GCVE (VulDB): GCVE-100-110708

Entryinfo

Created: 12/16/2017 16:24
Updated: 12/15/2019 13:24
Changes: 12/16/2017 16:24 (56), 12/15/2019 13:24 (2)
Complete: 🔍
Cache ID: 216::103