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@RISK Newsletter for May 18, 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. 20

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 2017-05-09 - 2017-05-16


TOP VULNERABILITY THIS WEEK: WannaCry Ransomware Compromises Hosts Around The World Via Worm-like Activity *


NOTABLE RECENT SECURITY ISSUES

SELECTED BY THE TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

Title: WannaCry Ransomware Compromises Hosts Around The World Via Worm-like Activity
Description: A major ransomware variant known as ‘WannaCry’ has compromised a large number of hosts around the world in a worm-like manner. WannaCry leverages tools and exploits leaked by the Shadow Brokers to exploit SMBv1 vulnerabilities patched by MS17-010. Damage appears to have been mitigated due to a “kill switch” domain being registered and thus, causing the malware to limit self propagation. Organizations should patch any vulnerable systems as well as block all inbound SMB traffic.
Reference: http://blog.talosintelligence.com/2017/05/wannacry.html?f_l=s
Snort SID: 41978, 42329-42332

Title: Apple Releases Security Updates; Addresses Flaws Demoed at Pwn2Own
Description: Apple has releases security updates for macOS, iOS, watchOS, tvOS, as well as Safari, iTunes, and iCloud for Windows. These updates resolve 66 vulnerabilities, many of which were demonstrated at the annual Pwn2Own hacking contest. Eleven of the vulnerabilities addressed in iOS could have led to arbitrary code execution via various methods.
Reference: https://support.apple.com/en-us/HT201222
Snort SID: Detection pending release of vulnerability information


INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

Microsoft Releases Security Updates for Out-of-Support Windows XP, Server 2003, and 8 in Response to WannaCry
https://blogs.technet.microsoft.com/msrc/2017/05/12/customer-guidance-for-wannacrypt-attacks/

ShadowBrokers Planning Monthly Exploit, Data Dump Service
https://threatpost.com/shadowbrokers-planning-monthly-exploit-data-dump-service/125710/

OpenVPN 2.4 Evaluation Summary and Report
https://www.privateinternetaccess.com/blog/2017/05/openvpn-2-4-evaluation-summary-report/

Breach at DocuSign Led to Targeted Email Malware Campaign
https://krebsonsecurity.com/2017/05/breach-at-docusign-led-to-targeted-email-malware-campaign/

Exploiting the Linux kernel via packet sockets
https://googleprojectzero.blogspot.com/2017/05/exploiting-linux-kernel-via-packet.html


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:
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 2017-05-09 - 2017-05-16:

COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: 24d004a104d4d54034dbcffc2a4b19a11f39008a575aa614ea04703480b1022c M
D5: db349b97c37d22f5ea1d1841e3c89eb4
VirusTotal: http://example.com/
Typical Filename: mssecsvc.exe
Claimed Product: Microsoft(R) Disk Defragmenter
Detection Name: W32.GenericKD:TrojanRansom.20gp.1201

SHA 256: ae7327f36a659d01a85d4071a4570458ec03a05a6ce7d2f6d092fb46aff3e739
MD5: fa1f769475516b03881602d0824cae12
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: printerinstallerclientupdater.exe
Claimed Product: Printer Updater Client
Detection Name: W32.AE7327F36A-95.SBX.TG

SHA 256: e95ada7eaa47b78e069cd2b78560d4e85b5ddfd27278234d9d38e6015a8734a8
MD5: 8723896b67bad4423ff1173bebd52e13
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: 20170512269031.pdf
Claimed Product: N/A
Detection Name: W32.E95ADA7EAA-100.SBX.TG

SHA 256: 6e2b4a15d133a62c95c1633d5cbf8a25fb165eb2bd38ffbcd049d0db14d0c33c
MD5: 3dad64eb956856a790d16014d5f3f4f6
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: 20170512376438.pdf
Claimed Product: N/A
Detection Name: W32.6E2B4A15D1-100.SBX.TG

SHA 256: 22d3b97d929c8639f6ea265f2c30e6db1bb5b8d3b54ff6466790f9fef35b4789
MD5: 424364553644a7d897b87632da4a130a
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: 20170511746985.pdf
Claimed Product: N/A
Detection Name: W32.22D3B97D92-100.SBX.TG


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