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@RISK Newsletter for March 23, 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. 12

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 2017-03-14 - 2017-03-21


TOP VULNERABILITY THIS WEEK: Cisco Releases Critical Security Advisory For IOS and IOS XE 0-day Found in “Vault 7” Info Dump


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

Title: Cisco Releases Critical Security Advisory For IOS and IOS XE 0-day Found in “Vault 7” Info Dump
Description: Cisco has released a critical security advisory in response to CVE-2017-3881, a 0-day vulnerability that was identified in the “Vault 7” information dump. CVE-2017-3881 is a remote code execution vulnerability that manifests in the Cisco Cluster Management Protocol (CMP) processing functionality of IOS and IOS XE. A remote, unauthenticated attacker who transmits malformed CMP-specific Telnet options to a vulnerable device could exploit this flaw and execute arbitrary code with elevated privileges. Note that the vulnerable device must be configured to accept Telnet connections. Cisco is currently developing software updates that will address this vulnerability.
Reference: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp
Snort SID: 41909-41910
Title: Various JSON Library Patched to Address Invalid Curve Crypto Attack
Description: Several JSON libraries have been patched to address a flaw in the implementation of JSON Web Encryption (JWE). Specifically, libraries that implement JWE for encryption with Key Agreement with Elliptic Curve Diffie-Hellman Ephemeral Static (ECDH-ES) were found to be vulnerable to an Invalid Curve Attack. This means that recovery of the private key could be possible. In response to this flaw being identified, go-jose, jose2go, Nimbus JOSE+WT, node-jose, and jose4 JSON libraries were all patched.
Reference: http://blog.intoth


INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

GitHub Enterprise Remote Code Execution
http://exablue.de/blog/2017-03-15-github-enterprise-remote-code-execution.html

VM Escape Earns Hackers $105K at Pwn2Own
https://threatpost.com/vm-escape-earns-hackers-105k-at-pwn2own/124397/

Samsung Leaking Customer Information
https://hackernoon.com/samsung-leaking-customer-information-9b7e2dcb006d?gi=18e80d0d0e11

How Common and How Reliable Are Randomized Mac Addresses
https://packetmozart.com/2017/03/21/how-common-and-how-reliable-are-randomized-mac-addresses/

0-day or Feature? Privilege Escalation/Session Hijacking Using RDP in Windows
http://www.korznikov.com/2017/03/0-day-or-feature-privilege-escalation.html

LastPass: websiteConnector.js content script allows proxying internal RPC commands
https://bugs.chromium.org/p/project-zero/issues/detail?id=1209


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-2017-5638
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-2016-9244
Title: F5 BIG-IP SSL Information Disclosure Vulnerability
Vendor: F5
Description: A BIG-IP virtual server configured with a Client SSL profile that has the non-default Session Tickets option enabled may leak up to 31 bytes of uninitialized memory. A remote attacker may exploit this vulnerability to obtain Secure Sockets Layer (SSL) session IDs from other sessions. It is possible that other data from uninitialized memory may be returned as well.
CVSS v2 Base Score: 5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N)

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-2016-7200
Title: Microsoft Edge Scripting Engine Memory Corruption Code Execution Vulnerability
Vendor: Microsoft
Description: The Chakra JavaScript scripting engine in Microsoft Edge allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka “Scripting Engine Memory Corruption Vulnerability,” a different vulnerability than CVE-2016-7201, CVE-2016-7202, CVE-2016-7203, CVE-2016-7208, CVE-2016-7240, CVE-2016-7242, and CVE-2016-7243.
CVSS v2 Base Score: 7.6 (AV:N/AC:H/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)

ID: CVE-2016-1017
Title: Adobe Flash Player “AS2 LoadVars” Use-after-free Code Execution Vulnerability (APSA16-10)
Vendor: Adobe
Description: Use-after-free vulnerability in the LoadVars.decode function in Adobe Flash Player before 18.0.0.343 and 19.x through 21.x before 21.0.0.213 on Windows and OS X and before 11.2.202.616 on Linux allows attackers to execute arbitrary code via unspecified vectors, a different vulnerability than CVE-2016-1011, CVE-2016-1013, CVE-2016-1016, and CVE-2016-1031.
CVSS v2 Base Score: 9.3 (AV:N/AC:M/Au:N/C:C/I:C/A:C)

ID: CVE-2016-0189
Title: Microsoft Internet Explorer Scripting Engine Memory Corruption Vulnerability
Vendor: Microsoft
Description: The Microsoft (1) JScript 5.8 and (2) VBScript 5.7 and 5.8 engines, as used in Internet Explorer 9 through 11 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted web site, aka “Scripting Engine Memory Corruption Vulnerability,” a different vulnerability than CVE-2016-0187.
CVSS v2 Base Score: 7.6 (AV:N/AC:H/Au:N/C:C/I:C/A:C)


MOST PREVALENT MALWARE FILES 2017-03-14 - 2017-03-21 COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: 24a4cffbe3b0c9394fa95cd2e8437210cd00b940f29884265134d0b53387e4c9
MD5: 335889e42e25203c77e9553e3987b6ae
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: helperamc.zip
Claimed Product: Advanced Mac Cleaner
Detection Name: W32.Trojan.NM

SHA 256: 8897f94710f3ca65af0e52f6e2b76e6319dd5fb0dd6ad0968f8acc0d25ee783a
MD5: cc9e1075db0645f1032f8c4b4412deba
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: winflnax.exe
Claimed Product: (none)
Detection Name: W32.8897F94710-95.SBX.TG

SHA 256: f4ae1a3d610a57547f014215a5d7aaed8572cd36aa77a9567c183f11430a6b55
MD5: 51e63633487f9180ec8031980684bf86
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: winfdttje.exe
Claimed Product: (none)
Detection Name: W32.F4AE1A3D61-95.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

SHA 256: aa44a8dd4563c03ac65650622cb3af81f52e8ea2e1df663f68e0061b8bcac3ce
MD5: 8dbdb1775921915dd66c68d430114e6f
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: ytwws.exe
Claimed Product: (none)
Detection Name: W32.Auto:aa44a8.in03.Talos


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