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@RISK Newsletter for June 22, 2017 The Consensus Security Vulnerability Alert

This is a weekly newsletter that provides in-depth analysis of the latest vulnerabilities with straightforward remediation advice. Qualys supplies a large part of the newly-discovered vulnerability content used in this newsletter.


@RISK: The Consensus Security Vulnerability Alert
Vol. 17, Num. 25

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.qualys.com/research/sans-at-risk/


CONTENTS:

NOTABLE RECENT SECURITY ISSUES
INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY
VULNERABILITIES FOR WHICH EXPLOITS ARE AVAILABLE
MOST PREVALENT MALWARE FILES 2017-06-13 - 2017-06-20
TOP VULNERABILITY THIS WEEK: “Stack Clash” Vulnerability Disclosed, Affecting Linux, BSD, and Solaris based Systems

NOTABLE RECENT SECURITY ISSUES
SELECTED BY THE TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

Title: “Stack Clash” Vulnerability Disclosed, Affecting Linux, BSD, and Solaris based SystemsDescription: Researchers at Qualys have identified a vulnerability in way Linux, BSD, and Solaris based systems manage memory that could allow attackers to corrupt memory and elevate their privileges. Dubbed “Stack Clash”, this series of vulnerabilities exploit system mismanagement of stack space and heap space where one could overlap the other, even with stack guard-page protection. Qualys notes that while their research has primarily focused on local exploitation, remote exploitation cannot be ruled out. Software updates that address these flaws in Linux, BSD, and Solaris based systems are available.
Reference:

Title: TP-Link Addresses Code Execution Vulnerabilities in Discontinued Routers
Description: Researchers at Senrio have identified and responsibly disclosed an arbitrary code execution vulnerability in TP-Link WN841N V8 routers. CVE-2017-9466 manifests as a logic flaw in the router that could allow an attacker to reset a router’s credentials where upon successfully resetting then, an attacker could then login and exploit a stack overflow vulnerability in the configuration services. Senrio notes that while TP-Link discontinued this router model, TP-Link did agree to develop an update that would remove the vulnerable service from the firmware. As a result, a software update that addresses this vulnerability is available.
Reference: http://blog.senr.io/blog/cve-2017-9466-why-is-my-router-blinking-morse-code

INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

Analysis of the Shadow Brokers release and mitigation with Windows 10 virtualization-based security
https://blogs.technet.microsoft.com/mmpc/2017/06/16/analysis-of-the-shadow-brokers-release-and-mitigation-with-windows-10-virtualization-based-security/

Bug Hunting: Drilling Into the Internet of Things (IoT)
https://duo.com/blog/bug-hunting-drilling-into-the-internet-of-things-iot

Say Goodbye to SMBv1 in Windows Fall Creators Update
https://threatpost.com/say-goodbye-to-smbv1-in-windows-fall-creators-update/126387/

Reckless Exploit: Mexican Journalists, Lawyers, and a Child Targeted with NSO Spyware
https://citizenlab.org/2017/06/reckless-exploit-mexico-nso/

DEFCON CTF Quals 2017 - Divided Writeup (Pwntools support for Windows)
https://www.securifera.com/blog/2017/06/18/defcon-ctf-2017-divided-writeup/

How I Stole Your Siacoin
https://mtlynch.io/stole-siacoins/

RECENT VULNERABILITIES FOR WHICH EXPLOITS ARE AVAILABLE
COMPILED BY THE QUALYS VULNERABILITY RESEARCH TEAM
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-2017-0145
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-2017-7269
Title: Microsoft IIS 6.0 ScStoragePathFromUrl Buffer Overflow Vulnerability
Vendor: Microsoft
Description: Buffer overflow in the ScStoragePathFromUrl function in the WebDAV service in Internet Information Services (IIS) 6.0 in Microsoft Windows Server 2003 R2 allows remote attackers to execute arbitrary code via a long header beginning with “If: <http://“ in a PROPFIND request, as exploited in the wild in July or August 2016.
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 2.5.10.1 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-2017-3823
Title: Cisco WebEx Google Chrome Extension Remote Code Execution Vulnerability
Vendor: Cisco
Description: An issue was discovered in the Cisco WebEx Extension before 1.0.7 on Google Chrome, the ActiveTouch General Plugin Container before 106 on Mozilla Firefox, the GpcContainer Class ActiveX control plugin before 10031.6.2017.0126 on Internet Explorer, and the Download Manager ActiveX control plugin before 2.1.0.10 on Internet Explorer. A vulnerability in these Cisco WebEx browser extensions could allow an unauthenticated, remote attacker to execute arbitrary code with the privileges of the affected browser on an affected system. This vulnerability affects the browser extensions for Cisco WebEx Meetings Server and Cisco WebEx Centers (Meeting Center, Event Center, Training Center, and Support Center) when they are running on Microsoft Windows. The vulnerability is a design defect in an application programing interface (API) response parser within the extension. An attacker that can convince an affected user to visit an attacker-controlled web page or follow an attacker-supplied link with an affected browser could exploit the vulnerability. If successful, the attacker could execute arbitrary code with the privileges of the affected browser.
CVSS v2 Base Score: 9.3 (AV:N/AC:M/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)
ID: CVE-2016-6366
Title: Cisco Adaptive Security Appliance SNMP Buffer Overflow Code Execution Vulnerability
Vendor: Cisco
Description: Buffer overflow in Cisco Adaptive Security Appliance (ASA) Software through 9.4.2.3 on ASA 5500, ASA 5500-X, ASA Services Module, ASA 1000V, ASAv, Firepower 9300 ASA Security Module, PIX, and FWSM devices allows remote authenticated users to execute arbitrary code via crafted IPv4 SNMP packets, aka Bug ID CSCva92151 or EXTRABACON.
CVSS v2 Base Score: 8.5 (AV:N/AC:M/Au:S/C:C/I:C/A:C)
MOST PREVALENT MALWARE FILES 2017-06-13 - 2017-06-20:
COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: 014891c5e4525f7bd94646af64137497338edda2a12985a9197b7603f54d5516
MD5: 433411c8f50a851244e023ba773114fc
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: Q87Y5PPWWI.doc
Claimed Product: N/A
Detection Name: W32.014891C5E4-100.SBX.TG

SHA 256: 127163c863b320814b6f420390db9d5ce48e9158bdb62aa94e953d85ec1e7a89
MD5: 7f2a4867df960ba7007b061f0a4f4a1d
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: MicTray64.exe
Claimed Product: mic tray icon
Detection Name: W32.Keylogger:Riskware.20ho.1201

SHA 256: 0cea297420f577ac984bbd8d655a0ab606cc527b779d0eea08936b2b8867db74
MD5: 45bec7475b9de16e1ee7921211f6d15f
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: is1230_1158.jar
Claimed Product: N/A
Detection Name: W32.Auto:0cea29.in03.Talos

SHA 256: 8a2163969c01bd47877c80510d9fc2cb14c6b1666c96c62e94b2a41c1a011615
MD5: 6d04c729b7be1e7827518f7e938d90cc
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: vbaProject.bin
Claimed Product: N/A
Detection Name: W32.8A2163969C-95.SBX.TG

SHA 256: e8f80d0b97ecb8ccb06741e99e04eb5c843c0d76c6ba40047b917033f0510386
MD5: 68047ef39c0958335c5ae9c5148c044a
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: mfon.zip
Claimed Product: Mac File Opener
Detection Name: W32.Trojan.NM


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