CONTENTS:

NOTABLE RECENT SECURITY ISSUES
INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY
VULNERABILITIES FOR WHICH EXPLOITS ARE AVAILABLE
MOST PREVALENT MALWARE FILES September 10 - 17, 2020
TOP VULNERABILITY THIS WEEK: Threat actors still targeting VPN vulnerabilities

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

Title: U.S. warns of exploitation of well-known vulnerabilities
Description: The U.S. Cybersecurity and Infrastructure Security Agency released a warning this week that state-sponsored actors are targeting several well-known vulnerabilities disclosed over the past year. Among them are vulnerabilities in the Pulse and Citrix VPN services that could allow an attacker to carry out directory-traversal attacks and infiltrate a victim’s network via the VPN. These same actors are also spreading several malware families through spear-phishing campaigns. Users in the public and private sectors are asked to update these affected products as soon as possible, including F5 BIG-IP, Pulse Secure VPN, Citrix VPN and Microsoft Exchange servers.
References: https://www.zdnet.com/article/cisa-chinese-state-hackers-are-exploiting-f5-citrix-pulse-secure-and-exchange-bugs/
Snort SIDs: 55637 - 55640

Title: Google Chrome PDFium memory corruption to lead to code execution
Description: Google Chrome’s PDFium feature could be exploited by an adversary to corrupt memory and potentially execute remote code. PDFium allows users to open PDFs inside Chrome. Cisco Talos researchers recently discovered a bug that would allow an adversary to send a malicious web page to a user, and then cause out-of-bounds memory access. To trigger this vulnerability, the victim must visit a malicious webpage or open a malicious PDF document.
References: https://blog.talosintelligence.com/2020/09/vuln-spotlight-google-pdfium-sept-2020.html
Snort SIDs: 54282, 54283

INTERESTING NEWS FROM AROUND THE SECURITY COMMUNITY

Microsoft warned that state-sponsored threat actors are targeting members of the Biden and Trump campaigns in the leadup to the November election.
https://blogs.microsoft.com/on-the-issues/2020/09/10/cyberattacks-us-elections-trump-biden/

The city of Portland, Oregon passed the broadest facial recognition ban of any American city or state, preventing law enforcement agencies, private companies and government agencies from using the technology “in places of public accommodation.”
https://www.popularmechanics.com/technology/security/a33982818/portland-facial-recognition-ban/

Oracle plans to acquire TikTok’s American operations to avoid a full-on ban from the Trump administration, though this will prompt a closer look into Oracle’s privacy policies and data collection.
https://www.politico.com/news/2020/09/15/oracle-tiktok-privacy-415043

Encrochat, a French encrypted network of Android phones, contains backdoors that could allow law enforcement to obtain users’ locations, messages, passwords and more.
https://www.vice.com/en_us/article/k7qjkn/encrochat-hack-gps-messages-passwords-data

A vulnerability in Joe Biden’s main campaign app could allow an attacker to steal information on registered voters by matching the user’s contacts with the TargetSmart political marketing service.
https://techcrunch.com/2020/09/14/biden-app-voter-files/

Security researchers are pushing to have their voices heard in the Supreme Court as America’s highest court considers a landmark case that could change the way researchers hunt for vulnerabilities.
https://www.cyberscoop.com/voatz-supreme-court-cfaa-security-research/

The U.S. Department of Veteran Affairs says a third-party actor compromised the personal information of 46,000 American military veterans through a vulnerability in an online application.
https://www.zdnet.com/article/department-of-veteran-affairs-discloses-breach-impacting-46000-veterans/

A US Federal Communications Commission filing includes photos of GrayKey, a tool commonly used by law enforcement agencies to unlock secured iPhones.
https://appleinsider.com/articles/20/09/15/grayshifts-graykey-iphone-forensics-tool-disassembled-in-fcc-photos

A memo written by a former Facebook data scientist states that the social media giant knew its platform was being used by world leaders to manipulate voters and declined to act.
​​​​​​​https://www.buzzfeednews.com/article/craigsilverman/facebook-ignore-political-manipulation-whistleblower-memo

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-2020-1472
Title: Microsoft Netlogon Elevation of Privilege Vulnerability
Vendor: Microsoft
Description: An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC). An attacker who successfully exploited the vulnerability could run a specially crafted application on a device on the network. To exploit the vulnerability, an unauthenticated attacker would be required to use MS-NRPC to connect to a domain controller to obtain domain administrator access.
CVSS v3 Base Score: 10.0 (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)

ID: CVE-2020-14386
Title: Linux kernel “af_packet.c” Memory Corruption Vulnerability
Vendor: Multi-Vendor
Description: A Memory corruption vulnerability exists in the Linux kernel that can be exploited to gain root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity.
CVSS v3 Base Score: 6.7 (AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

ID: CVE-2020-16875
Title: Microsoft Exchange Server Remote Code Execution Vulnerability
Vendor: Microsoft
Description: A remote code execution vulnerability exists in Microsoft Exchange server due to improper validation of cmdlet arguments. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the System user. Exploitation of the vulnerability requires an authenticated user in a certain Exchange role to be compromised.
CVSS v3 Base Score: 8.4 (AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H)

ID: CVE-2020-14356
Title: Linux Kernel Denial of Service Vulnerability
Vendor: Multi-Vendor
Description: A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system. Successful exploitation of this vulnerability could lead to disclosure of sensitive information, addition or modification of data, or Denial of Service
CVSS v3 Base Score: 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)

ID: CVE-2020-15505
Title: MobileIron Core and Connector Remote Code Execution Vulnerability
Vendor: MobileIron
Description: A remote code execution vulnerability exists in MobileIron Core and Connector, and Sentry, that allows remote attackers to execute arbitrary code via unspecified vectors. The manipulation with an unknown input leads to a privilege escalation vulnerability.
CVSS v3 Base Score: 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

ID: CVE-2020-2037
Title: PAN-OS Management Interface Command Injection Vulnerability
Vendor: PAN-OS
Description: An OS Command Injection vulnerability exists in the PAN-OS management interface that allows authenticated administrators to execute arbitrary OS commands with root privileges. This issue affects some unknown processing of the component Management Interface. The manipulation with an unknown input leads to a privilege escalation vulnerability.
CVSS v3 Base Score: | 7.2 (V:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)

ID: CVE-2020-0751
Title: Microsoft Windows Hyper-V Denial of Service Vulnerability
Vendor: Microsoft
Description: A denial of service vulnerability exists when Microsoft Hyper-V on a host server fails to properly validate specific malicious data from a user on a guest operating system. To exploit the vulnerability, an attacker who already has a privileged account on a guest operating system, running as a virtual machine, could run a specially crafted application.
CVSS v3 Base Score: 6.0 (AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H)

ID: CVE-2020-1380
Title: Microsoft Scripting Engine Memory Corruption Vulnerability
Vendor: Microsoft
Description: A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user.
CVSS v3 Base Score: 7.5 (AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H)

MOST PREVALENT MALWARE FILES September 10 - 17, 2020
COMPILED BY TALOS SECURITY INTELLIGENCE AND RESEARCH GROUP

SHA 256: 85b936960fbe5100c170b777e1647ce9f0f01e3ab9742dfc23f37cb0825b30b5
MD5: 8c80dd97c37525927c1e549cb59bcbf3
VirusTotal: https://www.virustotal.com/gui/file/85b936960fbe5100c170b777e1647ce9f0f01e3ab9742dfc23f37cb0825b30b5/details
Typical Filename: Eter.exe
Claimed Product: N/A
Detection Name: Win.Exploit.Shadowbrokers::5A5226262.auto.talos

SHA 256: 32155b070c7e1b9d6bdc021778c5129edfb9cf7e330b8f07bb140dedb5c9aae7
MD5: 73d1de319c7d61e0333471c82f2fc104
VirusTotal: https://www.virustotal.com/gui/file/32155b070c7e1b9d6bdc021778c5129edfb9cf7e330b8f07bb140dedb5c9aae7/details
Typical Filename: SAntivirusService.exe
Claimed Product: A n t i v i r u s S e r v i c e
Detection Name: Win.Dropper.Segurazo::tpd

SHA 256: c3e530cc005583b47322b6649ddc0dab1b64bcf22b124a492606763c52fb048f
MD5: e2ea315d9a83e7577053f52c974f6a5a
VirusTotal: https://www.virustotal.com/gui/file/c3e530cc005583b47322b6649ddc0dab1b64bcf22b124a492606763c52fb048f/details
Typical Filename: Tempmf582901854.exe
Claimed Product: N/A
Detection Name: Win.Dropper.Agentwdcr::1201

SHA 256: 15716598f456637a3be3d6c5ac91266142266a9910f6f3f85cfd193ec1d6ed8b
MD5: 799b30f47060ca05d80ece53866e01cc
VirusTotal: https://www.virustotal.com/gui/file/15716598f456637a3be3d6c5ac91266142266a9910f6f3f85cfd193ec1d6ed8b/details
Typical Filename: mf2016341595.exe
Claimed Product: N/A
Detection Name: Win.Downloader.Generic::1201

SHA 256: 7bd78114e61ae332e9e9d67b66cdab4a4db4e0c74dc43a0582ab1aecb13d7f0f
MD5: 6423f6d49466f739d4eaa2a30759c46a
VirusTotal: https://www.virustotal.com/gui/file/7bd78114e61ae332e9e9d67b66cdab4a4db4e0c74dc43a0582ab1aecb13d7f0f/details
Typical Filename: Xerox_Device_060214.exe
Claimed Product: N/A
Detection Name: Win.Dropper.Upatre::1201