Threat Signal Report

CISA Advisory on Vulnerabilities Actively Exploited By Threat Actors Supported by China

description-logo Description

On October 6, 2022, the National Security Agency (NSA), Cybersecurity and Infrastructure Security Agency (CISA), and Federal Bureau of Investigation (FBI) released a joint advisory that has a list of the most exploited vulnerabilities since 2020 by threat actors sponsored by China. The list includes 20 vulnerabilities across 13 vendors that were used against the U.S. and its allies.


Why is this Significant?

This is significant because the list contains vulnerabilities that are known to be exploited by Chinese threat actors. Patches and workarounds should be applied to the vulnerabilities as soon as possible.


What Vulnerabilities are on the List?

The list includes the following vulnerabilities:


  • CVE-2022-26134: Atlassian Confluence Remote Code Execution Vulnerability via OGNL Injection
  • CVE-2022-24112: APISIX Admin API default access token Remote Code Execution Vulnerability
  • CVE-2022-1388: F5 BIG-IP iControl REST Authentication Bypass Vulnerability
  • CVE-2021-44228: Apache Log4j Error Log Remote Code Execution Vulnerability
  • CVE-2021-42237: Sitecore XP Insecure Deserialization Remote Code Execution Vulnerability
  • CVE-2021-41773: Apache HTTP Server Path Traversal Vulnerability
  • CVE-2021-40539: Zoho ManageEngine ADSelfService Plus RESTAPI Authentication Bypass Vulnerability
  • CVE-2021-36260: Hikvision Product SDK WebLanguage Tag Command Injection Vulnerability
  • CVE-2021-27065: Microsoft Exchange Server CVE-2021-27065 Remote Code Execution Vulnerability
  • CVE-2021-26858: Microsoft Exchange Server CVE-2021-26858 Remote Code Execution Vulnerability
  • CVE-2021-26857: Microsoft Exchange Server CVE-2021-26857 Remote Code Execution Vulnerability
  • CVE-2021-26855: Microsoft Exchange Server ProxyRequestHandler Remote Code Execution Vulnerability
  • CVE-2021-26084: Atlassian Confluence CVE-2021-26084 Remote Code Execution Vulnerability
  • CVE-2021-22205: GitLab Community and Enterprise Edition Remote Command Execution Vulnerability
  • CVE-2021-22005: VMware vCenter Analytics Service Arbitrary File Upload Vulnerability
  • CVE-2021-20090: Buffalo WSR2533DHP Arbitrary Directory Traversal Vulnerability
  • CVE-2021-1497: Cisco HyperFlex HX Auth Handling Remote Command Execution Vulnerability
  • CVE-2020-5902: F5 BIG-IP Traffic Management User Interface Directory Traversal Vulnerability
  • CVE-2019-19781: Citrix ADC and Gateway Directory Traversal Vulnerability
  • CVE-2019-11510: Pulse Secure SSL VPN HTML5 Information Disclosure


What is the Status of Protection?

FortiGuard Labs has the following IPS protection in place for the vulnerabilities listed in the CISA advisory:


  • Atlassian.Confluence.OGNL.Remote.Code.Execution (CVE-2022-26134)
  • APISIX.Admin.API.default.token.Remote.Code.Execution (CVE-2022-24112)
  • F5.BIG-IP.iControl.REST.Authentication.Bypass (CVE-2022-1388)
  • Apache.Log4j.Error.Log.Remote.Code.Execution (CVE-2021-44228)
  • Sitecore.XP.Insecure.Deserialization.Remote.Code.Execution (CVE-2021-42237)
  • Apache.HTTP.Server.cgi-bin.Path.Traversal (CVE-2021-41773)
  • Zoho.ManageEngine.ADSelfService.Plus.Authentication.Bypass (CVE-2021-40539)
  • Hikvision.Product.SDK.WebLanguage.Tag.Command.Injection (CVE-2021-36260)
  • MS.Exchange.Server.CVE-2021-27065.Remote.Code.Execution (CVE-2021-27065)
  • MS.Exchange.Server.CVE-2021-26858.Remote.Code.Execution (CVE-2021-26858)
  • MS.Exchange.Server.UM.Core.Remote.Code.Execution (CVE-2021-26857)
  • MS.Exchange.Server.ProxyRequestHandler.Remote.Code.Execution (CVE-2021-26855)
  • Atlassian.Confluence.CVE-2021-26084.Remote.Code.Execution (CVE-2021-26084)
  • GitLab.Community.and.Enterprise.Edition.Command.Injection (CVE-2021-22205)
  • VMware.vCenter.Server.Analytics.Arbitrary.File.Upload (CVE-2021-22005)
  • Arcadyan.Routers.images.Path.Authentication.Bypass (CVE-2021-20090)
  • Cisco.HyperFlex.HX.Auth.Handling.Command.Injection (CVE-2021-1497)
  • F5.BIG.IP.Traffic.Management.User.Interface.Directory.Traversal (CVE-2020-5902)
  • Citrix.Application.Delivery.Controller.VPNs.Directory.Traversal (CVE-2019-19781)
  • Pulse.Secure.SSL.VPN.HTML5.Information.Disclosure (CVE-2019-11510)


Definitions

Traffic Light Protocol

Color When Should it Be used? How may it be shared?

TLP: RED

Not for disclosure, restricted to participants only.
Sources may use TLP:RED when information cannot be effectively acted upon by additional parties, and could lead to impacts on a party's privacy, reputation, or operations if misused. Recipients may not share TLP:RED information with any parties outside of the specific exchange, meeting, or conversation in which it was originally disclosed. In the context of a meeting, for example, TLP:RED information is limited to those present at the meeting. In most circumstances, TLP:RED should be exchanged verbally or in person.

TLP: AMBER

Limited disclosure, restricted to participants’ organizations.
Sources may use TLP:AMBER when information requires support to be effectively acted upon, yet carries risks to privacy, reputation, or operations if shared outside of the organizations involved. Recipients may only share TLP:AMBER information with members of their own organization, and with clients or customers who need to know the information to protect themselves or prevent further harm. Sources are at liberty to specify additional intended limits of the sharing: these must be adhered to.

TLP: GREEN

Limited disclosure, restricted to the community.
Sources may use TLP:GREEN when information is useful for the awareness of all participating organizations as well as with peers within the broader community or sector. Recipients may share TLP:GREEN information with peers and partner organizations within their sector or community, but not via publicly accessible channels. Information in this category can be circulated widely within a particular community. TLP:GREEN information may not be released outside of the community.

TLP: WHITE

Disclosure is not limited.
Sources may use TLP:WHITE when information carries minimal or no foreseeable risk of misuse, in accordance with applicable rules and procedures for public release. Subject to standard copyright rules, TLP:WHITE information may be distributed without restriction.