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@RISK Newsletter for February 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. 08

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


TOP VULNERABILITY THIS WEEK: OpenSSL Releases Security Advisory For High-severity Denial of Service Flaw


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

Title: OpenSSL Releases Security Advisory For High-severity Denial of Service Flaw
Description: OpenSSL has released a security advisory in response to CVE-2017-3733, a denial of service vulnerability that was privately disclosed to the OpenSSL Software Foundation. CVE-2017-3733 manifests “if the Encrypt-Then-Mac extension is negotiated” during the re-negotiation handshake when “it was not in the original handshake” of a SSL/TLS connection (or vice-versa). Exploiting this could cause both clients and servers to crash. OpenSSL has released a software update for the 1.1.0 branch to addressed this vulnerability. CVE-2017-3733 does not affect OpenSSL 1.0.2.
Reference: https://www.openssl.org/news/secadv/20170216.txt


INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

Investigating Off-Premise Wireless Behaviour (or, “I Know What You Connected To”)
https://isc.sans.edu/diary/22089

Google Discloses Unpatched Microsoft Vulnerability
https://threatpost.com/google-discloses-unpatched-microsoft-vulnerability/123812/

Google Project Zero: Attacking the Windows NVIDIA Driver
https://googleprojectzero.blogspot.com/2017/02/attacking-windows-nvidia-driver.html

Penetration Testing Tools Cheat Sheet
https://highon.coffee/blog/penetration-testing-tools-cheat-sheet/

Flipping Bits and Opening Doors: Reverse Engineering the Linear Wireless Security DX Protocol
https://duo.com/blog/flipping-bits-and-opening-doors-reverse-engineering-the-linear-wireless-security-dx-protocol


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-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 2017-02-14 - 2017-02-21 COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: bcffda040c93b743bca1a67128ec1f60595dc0b14655afd7949b6c779e0e997f
MD5: 2dbf779808d2ec3f5121891be9f4b1cf
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: helperamc
Claimed Product: Advanced Mac Cleaner
Detection Name: OSX.Variant:AMCZ.19if.1201

SHA 256: 64db0882534bfb82a05dd831b98694b2e175e10aa4a52167310c43ad65afa515
MD5: 77a865641639fff81fdce05f1d9c3f48
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: uces.exe
Claimed Product: UCES
Detection Name: W32.Auto.64db08.201556.in01

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: 1e62a41983d37f983100a9e9e2a5d4a89bd319f186f1a4d5d3ee35dea4de3f3c
MD5: f78d8193264019c79a15014a381c1355
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: RegKey.dll
Claimed Product: (none)
Detection Name: W32.Auto.1e62a4.201551.in01

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


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