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@RISK provides a reliable weekly summary of (1) newly discovered attack vectors, (2) vulnerabilities with active new exploits, (3) insightful explanations of how recent attacks worked, and other valuable data

A key purpose of the @RISK is to provide the data that will ensure that the 20 Critical Controls (the US and UK benchmark for effective protection of networked systems) continue to be the most effective defenses for all known attack vectors. But since it is also valuable for security practitioners, SANS is making it available to the 145,000 security practitioners who have completed SANS security training and others at their organizations who hope to stay current with the offensive methods in use.

September 28, 2017

@RISK: The Consensus Security Vulnerability Alert

Vol. 17, Num. 38

Providing a reliable, weekly summary of newly discovered attack vectors, vulnerabilities with active exploits, and explanations of how recent attacks worked

Archived issues may be found at https://www.sans.org/newsletters/at-risk



MOST PREVALENT MALWARE FILES 2017-09-19 - 2017-09-26


TOP VULNERABILITY THIS WEEK: Samba Addresses Man in the Middle Vulnerability

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Title: Samba Addresses Man in the Middle Vulnerability
Description: Samba has released a security bulletin addressing CVE-2017-12150, a vulnerability which could allow an attacker to man-in-the-middle SMBv1, v2, and v3 connections. CVE-2017-12150 manifests due to the fixes for CVE-2015-5296 being incomplete as well as several other conditions where the vulnerability might be triggered. Samba versions 3.0.25 to 4.6.7 are affected. Samba versions 4.6.8, 4.5.14, and 4.4.16 have been released which address this vulnerability.
Reference: https://www.samba.org/samba/security/CVE-2017-12150.html
Snort SID: Detection pending release of vulnerability information

Title: Citrix Releases Security Update for NetScaler ADC and NetScaler Gateway Management Interface
Description: Citrix has released a security advisory for CVE-2017-14602, an authentication bypass vulnerability affecting NetScaler ADC and NetScaler Gateway Management Interface. An attacker who has access to the NetScaler management interface could potentially exploit this vulnerability and gain administrative access to the appliance. Versions 10.1, 10.5, 11.0, 11.1, and 12.0 have been identified vulnerable. Citrix has released updated versions of NetScaler to address this vulnerability.
Reference: https://support.citrix.com/article/CTX227928
Snort SID: Detection pending release of vulnerability information



Threat Spotlight: Defray Ransomware Hits Healthcare and Education

CCleaner Command and Control Causes Concern

Deloitte hit by cyber-attack revealing clients' secret emails

Adobe Private PGP Key Leak a Blunder, But It Could Have Been Worse

The Great DOM Fuzz-off of 2017



This is a list of recent vulnerabilities for which exploits are available. System administrators can use this list to help in prioritization of their remediation activities. The Qualys Vulnerability Research Team compiles this information based on various exploit frameworks, exploit databases, exploit kits and monitoring of internet activity.

ID: CVE-2017-8759
Title: Microsoft .NET Framework Remote Code Execution Vulnerability
Vendor: Microsoft
Description: A remote code execution vulnerability exists when Microsoft .NET Framework processes untrusted input. Microsoft is aware of a report that an exploit for CVE-2017-8759 exists in the wild and is being used in targeted attacks.
Microsoft published a .NET security update to address this issue.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-9805
Title: Apache Struts REST plugin Remote Code Execution (S2-052)
Vendor: Apache Struts
Description: The REST Plugin is using a XStreamHandler with an instance of XStream for deserialization without any type filtering and this can lead to Remote Code Execution when deserializing XML payloads.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-0037
Title: Microsoft Internet Explorer Remote Code Execution (MS17-007)
Vendor: Microsoft
Description: Microsoft Internet Explorer 10 and 11 and Microsoft Edge have a type confusion issue in the Layout::MultiColumnBoxBuilder::HandleColumnBreakOnColumnSpanningElement function in mshtml.dll, which allows remote attackers to execute arbitrary code via vectors involving a crafted Cascading Style Sheets (CSS) token sequence and crafted JavaScript code that operates on a TH element.
CVSS v2 Base Score: 7.6 (AV:N/AC:H/Au:N/C:C/I:C/A:C)

ID: CVE-2017-0145
Title: Microsoft Windows SMB Remote Code Execution Vulnerability
Vendor: Microsoft
Description: The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0143, CVE-2017-0144, CVE-2017-0146, and CVE-2017-0148.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-0290
Title: Microsoft Malware Protection Engine Remote Code Execution Vulnerability
Vendor: Microsoft
Description: NScript in mpengine in Microsoft Malware Protection Engine with Engine Version before 1.1.13704.0, as used in Windows Defender and other products, allows remote attackers to execute arbitrary code or cause a denial of service (type confusion and application crash) via crafted JavaScript code within any file scanned by this engine.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-3881
Title: Cisco IOS and IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability
Vendor: Cisco
Description: A vulnerability in the Cisco Cluster Management Protocol (CMP) processing code in Cisco IOS and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an affected device or remotely execute code with elevated privileges. The Cluster Management Protocol utilizes Telnet internally as a signaling and command protocol between cluster members. The vulnerability is due to the combination of two factors: (1) the failure to restrict the use of CMP-specific Telnet options only to internal, local communications between cluster members and instead accept and process such options over any Telnet connection to an affected device; and (2) the incorrect processing of malformed CMP-specific Telnet options. An attacker could exploit this vulnerability by sending malformed CMP-specific Telnet options while establishing a Telnet session with an affected Cisco device configured to accept Telnet connections. An exploit could allow an attacker to execute arbitrary code and obtain full control of the device or cause a reload of the affected device. This affects Catalyst switches, Embedded Service 2020 switches, Enhanced Layer 2 EtherSwitch Service Module, Enhanced Layer 2/3 EtherSwitch Service Module, Gigabit Ethernet Switch Module (CGESM) for HP, IE Industrial Ethernet switches, ME 4924-10GE switch, RF Gateway 10, and SM-X Layer 2/3 EtherSwitch Service Module. Cisco Bug IDs: CSCvd48893.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2017-5638
Title: Apache Struts2 Input Validation Code Execution Vulnerability
Vendor: Apache
Description: The Jakarta Multipart parser in Apache Struts 2 2.3.x before 2.3.32 and 2.5.x before mishandles file upload, which allows remote attackers to execute arbitrary commands via a #cmd= string in a crafted Content-Type http header, as exploited in the wild in March 2017.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2016-7892
Title: Adobe Flash Player Use-After-Free Code Execution Vulnerability
Vendor: Adobe
Description: Remote exploitation of a use-after-free vulnerability in Adobe's Flash Player could allow attackers to execute arbitrary code. Adobe is aware of a report that an exploit for CVE-2016-7892 exists in the wild, and is being used in limited targeted attacks.
CVSS v2 Base Score: 9.3 (AV:N/AC:M/Au:N/C:C/I:C/A:C)



SHA 256: c3e530cc005583b47322b6649ddc0dab1b64bcf22b124a492606763c52fb048f
MD5: e2ea315d9a83e7577053f52c974f6a5a
VirusTotal: https://www.virustotal.com/file/c3e530cc005583b47322b6649ddc0dab1b64bcf22b124a492606763c52fb048f/analysis/#additional-info
Typical Filename: Tempmf582901854.exe
Claimed Product: (none)
Detection Name: W32.C3E530CC00-95.SBX.TG

SHA 256: dbf3890b782ac04136c3336814eef97e3c0f4133f9592e882c131c179161b27b
MD5: 0c694193ceac8bfb016491ffb534eb7c
VirusTotal: https://www.virustotal.com/file/dbf3890b782ac04136c3336814eef97e3c0f4133f9592e882c131c179161b27b/analysis/#additional-info
Typical Filename: mssecsvc.exe
Claimed Product: (none)
Detection Name: W32.Ransom:TrojanRansom.20ks.1201

SHA 256: 8f5a7ec56b6c7aed0476e9a45b7191949166c3c067c0ed40f727e73c177d5434
MD5: e94cfa8a3083add44192befa728f1934
VirusTotal: https://www.virustotal.com/file/8f5a7ec56b6c7aed0476e9a45b7191949166c3c067c0ed40f727e73c177d5434/analysis/#additional-info
Typical Filename: Bighits4u_Render.exe
Claimed Product: Bighits4U Viewer
Detection Name: W32.Variant.20km.1201

SHA 256: 87afd627b678da78d879dfe11c147b10f5db6e07cd16e5728ca33579e73bf89f
MD5: 515ea84f7ca8f59f7bb4fb5714913a72
VirusTotal: https://www.virustotal.com/file/87afd627b678da78d879dfe11c147b10f5db6e07cd16e5728ca33579e73bf89f/analysis/#additional-info
Typical Filename: helperamc.zip
Claimed Product: Advanced Mac Cleaner
Detection Name: W32.87AFD627B6-95.SBX.TG

SHA 256: 5bb5975dd0b781d5fab3721ae66463e64825fccfdcf876bcb8899c2571ed04f4
MD5: 038a5260e24949da9596d3ae64266777
VirusTotal: https://www.virustotal.com/file/5bb5975dd0b781d5fab3721ae66463e64825fccfdcf876bcb8899c2571ed04f4/analysis/#additional-info
Typical Filename: 2017 (26 Sep 17).doc
Claimed Product: N/A
Detection Name: W32.5BB5975DD0-100.SBX.TG


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