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@RISK Newsletter for March 02, 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. 09

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 2017-02-21 - 2017-02-28


TOP VULNERABILITY THIS WEEK: CloudFlare Reverse Proxies Found To Be Leaking Uninitialized Memory, Exposing Sensitive InformationCloudFlare Reverse Proxies Found To Be Leaking Uninitialized Memory, Exposing Sensitive Information


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

Title: CloudFlare Reverse Proxies Found To Be Leaking Uninitialized Memory, Exposing Sensitive Information
Description: CloudFlare reverse proxies were recently discovered to be leaking uninitialized memory, potentially exposing sensitive information such as user passwords, authentication tokens, and other data. These leaks, first identified by Tavis Ormandy of Google Project Zero, have been traced to memory over-read bug in a server-side HTML parser on CloudFlare’s reverse proxies. CloudFlare has responded by disabling and patching the vulnerable functionality. Google and other search engines have also responded by purging cached copies of web pages that were affected by this flaw.
Reference: - https://blog.cloudflare.com/incident-report-on-memory-leak-caused-by-cloudflare-parser-bug/

Title: Google Project Zero Discloses Pair of Vulnerabilities in Microsoft Windows and IE/Edge
Description: Google’s Project Zero team has disclosed a pair of vulnerabilities that were identified in Windows and IE/Edge. One of these vulnerabilities is a memory disclosure flaw in the Window GDI library. The other flaw is a bit more severe as it’s a type-confusion vulnerability affecting Edge and Internet Explorer. These two vulnerabilities were disclosed as they exceeded the 90-day disclosure deadline policy set forth by Project Zero. Patches for these vulnerabilities are not yet available, but are expected in the next Patch Tuesday.
Reference: - https://bugs.chromium.org/p/project-zero/issues/detail?id=992

Snort SID: 41625-41626, additional detection pending further information

Title: DCCP Double-free Vulnerability in Linux Kernel Identified and Patched
Description: A double-free vulnerability in the Linux kernel has been identified by Andrey Konovalov, an independent researcher. This vulnerability, which has been assigned CVE-2017-6074, manifests in the DCCP functionality of the kernel and could be exploited to achieve code execution in the context of the kernel as an unprivileged process. The Linux kernel has been patched to address this vulnerability. Fixes for this flaw are expected to be incorporated into Linux distributions.
Reference: http://seclists.org/oss-sec/2017/q1/471


INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

Google Announces First SHA1 Collision
https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html

Web Cache Deception Attack
http://omergil.blogspot.com.au/2017/02/web-cache-deception-attack.html

Fingerprinting Firefox users with cached intermediate CA certificates (#fiprinca)
https://shiftordie.de/blog/2017/02/21/fingerprinting-firefox-users-with-cached-intermediate-ca-certificates-fiprinca/

Korean MalDoc Drops Evil New Years Presents
http://blog.talosintelligence.com/2017/02/korean-maldoc.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-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 2017-02-21 - 2017-02-28 COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: d2d786e373e968858e8a45118b20b744c621e10c84d5bbfddd0ff12841c5442b
MD5: 64804622a77cb0fc6c1af2e27d6132e6
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: ADP_Invoice_rgiovanninetti.doc
Claimed Product: N/A
Detection Name: W32.D2D786E373-100.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: d3dbe14033ad25a5e4ffe1e2b559e53ee1d1799eb54eedbd7a689d6a88fd7137
MD5: f4be84934734b03d7f11e22b4de7fd0a
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: Danielic
Claimed Product: (unknown)
Detection Name: OSX.MAC:Malwaregen.19hh.1201

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

SHA 256: f4ae1a3d610a57547f014215a5d7aaed8572cd36aa77a9567c183f11430a6b55
MD5: 51e63633487f9180ec8031980684bf86
VirusTotal: Additional information from antivirus scan analysis
Typical Filename: winfdttje.exe
Claimed Product: (none)
Detection Name: W32.AE7327F36A-95.SBX.TG


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