CVE-2019-1855 : What You Need to Know
Learn about CVE-2019-1855, a high-severity vulnerability in Cisco Jabber for Windows allowing local attackers to execute arbitrary code. Find mitigation steps and patch information here.
Cisco Jabber for Windows DLL Preloading Vulnerability was published on July 3, 2019, with a CVSS base score of 7.3.
Understanding CVE-2019-1855
This CVE involves a vulnerability in the loading mechanism of specific dynamic link libraries in Cisco Jabber for Windows.
What is CVE-2019-1855?
The vulnerability allows an authenticated local attacker to perform a DLL preloading attack by placing a malicious DLL file on the targeted system.
The Impact of CVE-2019-1855
- CVSS Base Score: 7.3 (High Severity)
- Attack Vector: Local
- Attack Complexity: Low
- Privileges Required: Low
- User Interaction: Required
- Confidentiality, Integrity, and Availability Impact: High
Technical Details of CVE-2019-1855
Vulnerability Description
The loading mechanism of specific dynamic link libraries in Cisco Jabber for Windows allows a local attacker to execute arbitrary code on the target machine.
Affected Systems and Versions
- Affected Product: Cisco Jabber for Windows
- Vendor: Cisco
- Affected Versions: Less than 12.6(0) (unspecified)
Exploitation Mechanism
The attacker needs valid credentials on the Windows system to exploit the vulnerability by placing a malicious DLL file in a designated location.
Mitigation and Prevention
Immediate Steps to Take
- Apply the latest security updates from Cisco.
- Monitor Cisco's security advisories for patches.
Long-Term Security Practices
- Implement the principle of least privilege to restrict access.
- Regularly review and update security configurations.
- Conduct security training to raise awareness among users.
Patching and Updates
- Cisco has released patches to address this vulnerability.