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@RISK Newsletter for August 25, 2016 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. 16, Num. 34

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 2016-08-16 - 2016-08-23


TOP VULNERABILITY THIS WEEK: Cisco Issues Security Advisories for Vulnerabilities Disclosed by the Shadow Brokers


NOTABLE RECENT SECURITY ISSUES

SELECTED BY THE TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

Title: Cisco Issues Security Advisories for Vulnerabilities Disclosed by the Shadow Brokers
Description: Cisco has issued a pair of security advisories for two vulnerabilities disclosed by the Shadow Brokers. Both vulnerabilities, CVE-2016-6366 and CVE-2016-6367, target ASA and PIX devices. CVE-2016-6366 is a remote code execution vulnerability within the SNMP code of ASA software and could allow an attacker to “obtain full control of the system or to cause a reload of the affected system.” CVE-2016-6367 is a known vulnerability that was patched in 2011. Cisco is currently developing a software update that will address CVE-2016-6366 for ASA devices (PIX devices are End-of-Life and are not supported). Network admins are strongly advised to employ mitigation strategies outlined in the bulletin to reduce the risk of compromise.
Reference: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-snmp
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160817-asa-cli
Snort SID: 39885

Title: Security Advisory for RNG Bug in Libgcrypt and GnuPG Issued
Description: A security advisory for Libgcrypt and GnuPG has been issued in response to a bug researchers have identified in the random number generator (RNG). Researchers have “found a bug in the mixing functions of Libgcrypt’s random number generator” where “an attacker who obtains 4640 bits from the RNG can trivially predict the next 160 bits of output.” Developers note that despite the bug being present in all versions of Libgcrypt and GnuPG since 1998, that initial analysis suggests that “existing RSA keys are not weakened” and DSA and Elgmal keys are unlikely to be “predicted from other public information.” Updated version of GnuPG and Libgcrypt have been released addressing this issue.
Reference: http://lists.gnu.org/archive/html/info-gnu/2016-08/msg00008.html


INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

Leak Data by Shadow Brokers Exhibits Link to the “Equation Group”
https://securelist.com/blog/incidents/75812/the-equation-giveaway/

Videos from Black Hat 2016 Posted on YouTube
https://www.youtube.com/playlist?list=PLH15HpR5qRsXm0-rMacuWBxWcB2fmsmEw

ThreatConnect Identifies FANCY BEAR Ties to World Anti-Doping Agency Phishing
https://www.threatconnect.com/blog/fancy-bear-anti-doping-agency-phishing/

Deep Analysis of CVE-2016-3820 - Remote Code Execution Vulnerability in Android Mediaserver
https://blog.fortinet.com/2016/08/17/deep-analysis-of-cve-2016-3820-remote-code-execution-vulnerability-in-android-mediaserver

Pwntools v3.0 Released
https://www.reddit.com/r/netsec/comments/4z3noh/pwntools_v30_released/

WMI vs. WMI: Monitoring for Malicious Activity
https://www.fireeye.com/blog/threat-research/2016/08/wmi_vs_wmi_monitor.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-2016-6366
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-2016-4171
Title: Adobe Flash Code Execution Vulnerability (APSA16-03)
Vendor: Adobe
Description: Unspecified vulnerability in Adobe Flash Player 21.0.0.242 and earlier allows remote attackers to execute arbitrary code via unknown vectors, as exploited in the wild in June 2016.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2016-0185
Title: Microsoft Windows Media Center Input Validation Remote Code Execution Vulneraiblity (MS16-059)
Vendor: Microsoft
Description: Media Center in Microsoft Windows Vista SP2, Windows 7 SP1, and Windows 8.1 allows remote attackers to execute arbitrary code via a crafted Media Center link (aka .mcl) file, aka “Windows Media Center Remote Code Execution Vulnerability.”
CVSS v2 Base Score: 9.3 (AV:N/AC:M/Au:N/C:C/I:C/A:C)

ID: CVE-2016-4117
Title: Adobe Flash Player Integer Overflow Code Execution Vulnerability (APSA16-02)
Vendor: Adobe
Description: Adobe Flash Player 21.0.0.226 and earlier allows remote attackers to execute arbitrary code via unspecified vectors, as exploited in the wild in May 2016.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/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)

ID: CVE-2016-1287
Title: Cisco ASA Software IKEv1 and IKEv2 Buffer Overflow Vulnerability
Vendor: Cisco
Description: Buffer overflow in the IKEv1 and IKEv2 implementations in Cisco ASA Software before 8.4(7.30), 8.7 before 8.7(1.18), 9.0 before 9.0(4.38), 9.1 before 9.1(7), 9.2 before 9.2(4.5), 9.3 before 9.3(3.7), 9.4 before 9.4(2.4), and 9.5 before 9.5(2.2) on ASA 5500 devices, ASA 5500-X devices, ASA Services Module for Cisco Catalyst 6500 and Cisco 7600 devices, ASA 1000V devices, Adaptive Security Virtual Appliance (aka ASAv), Firepower 9300 ASA Security Module, and ISA 3000 devices allows remote attackers to execute arbitrary code or cause a denial of service (device reload) via crafted UDP packets, aka Bug IDs CSCux29978 and CSCux42019.
CVSS v2 Base Score: 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C)

ID: CVE-2016-3081
Title: Apache Struts Input Validation Remote Code Execution Vulnerability
Vendor: Apache Structs
Description: Apache Struts 2.x before 2.3.20.2, 2.3.24.x before 2.3.24.2, and 2.3.28.x before 2.3.28.1, when Dynamic Method Invocation is enabled, allow remote attackers to execute arbitrary code via method: prefix, related to chained expressions.
CVSS v2 Base Score: 9.3 (AV:N/AC:M/Au:N/C:C/I:C/A:C)


MOST PREVALENT MALWARE FILES 2016-08-16 - 2016-08-23:

COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: 1186B59C3502D09B525C919AAC7689181F2E5EB7C5B952F9019319BA4B28F538
MD5: e61094e3b2fe6915ebedb08b138ecbf8
VirusTotal: https://www.virustotal.com/file/1186B59C3502D09B525C919AAC7689181F2E5EB7C5B952F9019319BA4B28F538/analysis/#additional-info
Typical Filename: invoice_7811658.doc
Claimed Product: N/A
Detection Name: W32.1186B59C35-100.SBX.TG

SHA 256: 6DAD70E062E1F0CD0CE5AE46F425578C807E18879C698FA10A7AAEFD2C6BB2D0
MD5: 37fb7e0aa7c8a5da349f143b7c149b61
VirusTotal: https://www.virustotal.com/file/6DAD70E062E1F0CD0CE5AE46F425578C807E18879C698FA10A7AAEFD2C6BB2D0/analysis/#additional-info
Typical Filename: invoice_271779.doc
Claimed Product: N/A
Detection Name: W32.6DAD70E062-100.SBX.TG

SHA 256: 6871841C762FC6D76BBADF69D27159BE1BBD11F010985E277FC1F550EEF45492
MD5: 0c66532ce06a988b837c211ff4de6261
VirusTotal: https://www.virustotal.com/file/6871841C762FC6D76BBADF69D27159BE1BBD11F010985E277FC1F550EEF45492/analysis/#additional-info
Typical Filename: invoice_423997.doc
Claimed Product: N/A
Detection Name: W32.6871841C76-100.SBX.TG

SHA 256: BCFFDA040C93B743BCA1A67128EC1F60595DC0B14655AFD7949B6C779E0E997F
MD5: 2dbf779808d2ec3f5121891be9f4b1cf
VirusTotal: https://www.virustotal.com/file/BCFFDA040C93B743BCA1A67128EC1F60595DC0B14655AFD7949B6C779E0E997F/analysis/#additional-info
Typical Filename: helperamc
Claimed Product: (none)
Detection Name: OSX.Variant:AMCZ.19if.1201

SHA 256: EF34EC74EA862A87E4881CA8FB5AF8EDABC5787CB01E2D2C2C1AF8BF3212707E
MD5: bf5cc4ec35a31ef00b697ad24f3a327f
VirusTotal: https://www.virustotal.com/file/EF34EC74EA862A87E4881CA8FB5AF8EDABC5787CB01E2D2C2C1AF8BF3212707E/analysis/#additional-info
Typical Filename: invoice_4475282.doc
Claimed Product: N/A
Detection Name: W32.EF34EC74EA-100.SBX.TG


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