Summary

• Multiple vulnerabilities in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms could allow an attacker to execute arbitrary programs on the underlying operating system with elevated privileges, access sensitive information, intercept protected network traffic, or cause a denial of service (DoS) condition.

  For more information about these vulnerabilities, see the Details section of this advisory.

  Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

  This advisory is available at the following link:
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-jabber-PWrTATTC

Affected Products

• Vulnerable Products

  These vulnerabilities affect Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms.

  For information about which Cisco software releases are vulnerable, see the Fixed Software section of this advisory.

  The following table indicates which platforms are affected by each Cisco CVE ID that is described in the Details section of this advisory.

  Cisco Jabber Platform	Associated CVE IDs
  Windows	CVE-2021-1411, CVE-2021-1417, CVE-2021-1418, CVE-2021-1469, and CVE-2021-1471
  MacOS	CVE-2021-1418 and CVE-2021-1471
  Android and iOS	CVE-2021-1418 and CVE-2021-1471

   

  Products Confirmed Not Vulnerable

  Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities.

  Cisco has confirmed that these vulnerabilities, with the exception of CVE-2021-1471, do not affect Cisco Jabber client software that is configured for either of the following modes:

  • Phone-only mode
  • Team Messaging Mode

Details

• The vulnerabilities are not dependent on one another. Exploitation of one of the vulnerabilities is not required to exploit another vulnerability. In addition, a software release that is affected by one of the vulnerabilities may not be affected by the other vulnerabilities.

  To exploit the vulnerabilities, an attacker must be:

  • Authenticated to an Extensible Messaging and Presence Protocol (XMPP) server that the affected software is using
  • Able to send XMPP messages to a targeted system

  Cisco has confirmed that these vulnerabilities, with the exception of CVE-2021-1471, do not affect Cisco Jabber client software that is configured for either of the following modes:

  • Phone-only mode
  • Team Messaging Mode

  Details about the vulnerabilities are as follows:

  CVE-2021-1411: Cisco Jabber Arbitrary Program Execution Vulnerability

  A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to execute programs on a targeted system.

  This vulnerability is due to improper validation of message content. An attacker could exploit this vulnerability by sending crafted XMPP messages to the affected software. A successful exploit could allow the attacker to cause the application to execute arbitrary programs on the targeted system with the privileges of the user account that is running the Cisco Jabber client software, which could result in arbitrary code execution.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvw96073
  CVE ID: CVE-2021-1411
  Security Impact Rating (SIR): Critical
  CVSS Base Score: 9.9
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

  CVE-2021-1469: Cisco Jabber Arbitrary Program Execution Vulnerability

  A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to execute programs on a targeted system.

  This vulnerability is due to improper validation of message content. An attacker with a specially provisioned XMPP server account could exploit this vulnerability by sending crafted XMPP messages to the affected software. A successful exploit could allow the attacker to cause the application to execute arbitrary programs on the targeted system with the privileges of the user account that is running the Cisco Jabber client software, which could result in arbitrary code execution.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvx36433
  CVE ID: CVE-2021-1469
  Security Impact Rating (SIR): High
  CVSS Base Score: 7.2
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

  CVE-2021-1417: Cisco Jabber Information Disclosure Vulnerability

  A vulnerability in Cisco Jabber for Windows could allow an authenticated, remote attacker to access sensitive information.

  This vulnerability is due to improper validation of message content. An attacker could exploit this vulnerability by sending crafted XMPP messages to a targeted system. A successful exploit could allow the attacker to cause the application to return sensitive authentication information to another system, which the attacker could use in further attacks.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvw96075
  CVE ID: CVE-2021-1417
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 6.5
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

  CVE-2021-1471: Cisco Jabber Certificate Validation Vulnerability

  A vulnerability in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms could allow an unauthenticated, remote attacker to intercept protected network traffic.

  This vulnerability is due to improper validation of certificates. An attacker could exploit this vulnerability by using a privileged network position to intercept network requests from the affected software and present a maliciously crafted certificate. A successful exploit could allow the attacker to inspect or modify connections between the Cisco Jabber client and a server.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvx43270
  CVE ID: CVE-2021-1471
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 5.6
  CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

  CVE-2021-1418: Cisco Jabber Denial of Service Vulnerability

  A vulnerability in Cisco Jabber for Windows, Cisco Jabber for MacOS, and Cisco Jabber for mobile platforms could allow an authenticated, remote attacker to cause a DoS condition.

  This vulnerability is due to improper validation of message content. An attacker could exploit this vulnerability by sending crafted XMPP messages to a targeted system. A successful exploit could allow the attacker to cause the application to terminate, resulting in a DoS condition.

  Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

  Bug ID(s): CSCvw96079
  CVE ID: CVE-2021-1418
  Security Impact Rating (SIR): Medium
  CVSS Base Score: 4.3
  CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Workarounds

• There are no workarounds that address these vulnerabilities.

Fixed Software

• Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:
  https://www.cisco.com/c/en/us/products/end-user-license-agreement.html

  Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.

  When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page, to determine exposure and a complete upgrade solution.

  In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.

  Customers Without Service Contracts

  Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html

  Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.

  Fixed Releases

  Customers are advised to upgrade to an appropriate fixed software release as indicated in the following tables:

  Cisco Jabber for Windows

  Cisco Jabber for Windows Release	First Fixed Release
  Earlier than 12.1	Migrate to a fixed release.
  12.1	12.1.5
  12.5	12.5.4
  12.6	12.6.5
  12.7	12.7.4
  12.8	12.8.5
  12.9	12.9.5

  Cisco Jabber for MacOS

  Cisco Jabber for MacOS Release	First Fixed Release
  12.7 and earlier	Migrate to a fixed release.
  12.8	12.8.7
  12.9	12.9.6

  Cisco Jabber for Android and iOS

  Cisco Jabber for Android and iOS Release	First Fixed Release
  12.9 and earlier	Migrate to a fixed release.
  14.01	Not vulnerable.

   

  Cisco Jabber for BlackBerry and Cisco Jabber for Intune MAM

   

  Cisco Jabber	First Fixed Release
  12.9	12.9.1

Exploitation and Public Announcements

• The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.

Source

• Cisco would like to thank Olav Sortland Thoresen of Watchcom for reporting the following vulnerabilities: CVE-2021-1411, CVE-2021-1417, and CVE-2021-1418.

  The following vulnerabilities were found during internal security testing: CVE-2021-1469 and CVE-2021-1471.

URL

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cisco-jabber-PWrTATTC

Revision History

• Version	Description	Section	Status	Date
  1.1	Included additional information for software updates for additional mobile platforms.	Fixed Software	Final	2021-MAR-25
  1.0	Initial public release.	—	Final	2021-MAR-24

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