Cisco Jabber for Windows DLL Preloading Vulnerability

Summary

A vulnerability in the loading mechanism of specific dynamic link libraries in Cisco Jabber for Windows could allow an authenticated, local attacker to perform a DLL preloading attack.

Credit:

The information has been provided by wjcsharp

The original article can be found at:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-jabber-dll


Details

To exploit this vulnerability, the attacker would need to have valid credentials on the Windows system. The vulnerability is due to insufficient validation of the resources loaded by the application at run time. An attacker could exploit this vulnerability by crafting a malicious DLL file and placing it in a specific location on the targeted system. The malicious DLL file would execute when the Jabber application launches. A successful exploit could allow the attacker to execute arbitrary code on the target machine with the privileges of another user’s account.

Vulnerable Systems:

Cisco Jabber for Windows 11.8
Cisco Jabber for Windows 9.2.1
Cisco Jabber for Windows 9.2
Cisco Jabber for Windows 9.1.5
Cisco Jabber for Windows 9.1.4
Cisco Jabber for Windows 9.1.3
Cisco Jabber for Windows 9.1.2
Cisco Jabber for Windows 9.1.1
Cisco Jabber for Windows 9.1
Cisco Jabber for Windows 9.0.5
Cisco Jabber for Windows 9.0.4
Cisco Jabber for Windows 9.0.3
Cisco Jabber for Windows 9.0.2
Cisco Jabber for Windows 9.0.1
Cisco Jabber for Windows 9.7(5)
Cisco Jabber for Windows 9.7(4)
Cisco Jabber for Windows 9.7(3)
Cisco Jabber for Windows 9.7(2)
Cisco Jabber for Windows 9.7(1)
Cisco Jabber for Windows 9.7(0)
Cisco Jabber for Windows 9.6(3)
Cisco Jabber for Windows 9.6(2)
Cisco Jabber for Windows 9.6(1)
Cisco Jabber for Windows 9.6(0)
Cisco Jabber for Windows 11.9(2.57651)
Cisco Jabber for Windows 11.9(1)
Cisco Jabber for Windows 11.9(0.54450)
Cisco Jabber for Windows 11.9(0)
Cisco Jabber for Windows 11.8(4.52954)
Cisco Jabber for Windows 11.8(4)
Cisco Jabber for Windows 11.8(3)
Cisco Jabber for Windows 11.8(2)
Cisco Jabber for Windows 11.8(1)
Cisco Jabber for Windows 11.8(0)
Cisco Jabber for Windows 11.5(1)
Cisco Jabber for Windows 11.5
Cisco Jabber for Windows 11.1
Cisco Jabber for Windows 11.0
Cisco Jabber for Windows 10.6
Cisco Jabber for Windows 10.5(2)

CVE Information:

CVE-2019-1855

Disclosure Timeline:
Published Date:07/04/2019