Vulnerability Details : CVE-2015-3326

Trend Micro ScanMail for Microsoft Exchange (SMEX) 10.2 before Hot Fix Build 3318 and 11.0 before Hot Fix Build 4180 creates session IDs for the web console using a random number generator with predictable values, which makes it easier for remote attackers to bypass authentication via a brute force attack.

Published 2015-05-14 00:59:04

Updated 2017-01-03 03:00:01

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2015-3326

Probability of exploitation activity in the next 30 days: 0.29%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 65 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2015-3326

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	nvd@nist.gov
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None

References for CVE-2015-3326

http://www.securityfocus.com/bid/74661

Trend Micro ScanMail for Microsoft Exchange Predictable Random Number Generator Weakness
http://www.securitytracker.com/id/1032323

Trend Micro ScanMail for Microsoft Exchange Weak Session ID Generation Lets Remote Users Hijack Sessions - SecurityTracker
http://blog.malerisch.net/2016/05/trendmicro-smex-session-predictable-cve-2015-3326.html

TrendMicro ScanMail for Microsoft Exchange (SMEX) predictable session token - CVE-2015-3326
http://esupport.trendmicro.com/solution/en-US/1109669.aspx

Session ID is vulnerable to remote attacker - ScanMail for Exchange
Vendor Advisory

Products affected by CVE-2015-3326

Trend Micro » Scanmail » Version: 11.0 For Microsoft Exchange
cpe:2.3:a:trend_micro:scanmail:11.0:*:*:*:*:microsoft_exchange:*:*
Matching versions
Trend Micro » Scanmail » Version: 10.2 For Microsoft Exchange
cpe:2.3:a:trend_micro:scanmail:10.2:*:*:*:*:microsoft_exchange:*:*
Matching versions