CVE-2019-1855: Cisco Jabber for Windows DLL Preloading Vulnerability
First published: Thu Jul 04 2019(Updated: )
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. 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.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Jabber | <12.6\(2\) |
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Reference Links
Frequently Asked Questions
What is CVE-2019-1855?
CVE-2019-1855 is a vulnerability in the loading mechanism of specific dynamic link libraries in Cisco Jabber for Windows.
How severe is CVE-2019-1855?
CVE-2019-1855 has a severity score of 7.3, which is considered critical.
How does CVE-2019-1855 affect Cisco Jabber for Windows?
CVE-2019-1855 affects Cisco Jabber for Windows version up to and excluding 12.6(2).
What is the impact of CVE-2019-1855?
CVE-2019-1855 could allow an authenticated, local attacker to perform a DLL preloading attack if they have valid credentials on the Windows system.
How can I fix CVE-2019-1855?
To fix CVE-2019-1855, it is recommended to upgrade Cisco Jabber for Windows to a version beyond 12.6(2).
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