openslp openslp CVE-2019-5544 vulnerability in Openslp and Other Products
Published on December 6, 2019

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OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.

Vendor Advisory NVD

Known Exploited Vulnerability

This VMware ESXi/Horizon DaaS Appliances Heap-Overwrite Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. OpenSLP as used in ESXi and the Horizon DaaS appliances have a heap overwrite issue. A malicious actor with network access to port 427 on an ESXi host or on any Horizon DaaS management appliance may be able to overwrite the heap of the OpenSLP service resulting in remote code execution.

The following remediation steps are recommended / required by May 3, 2022: Apply updates per vendor instructions.

Vulnerability Analysis

CVE-2019-5544 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. It has the highest possible exploitability rating (3.9). The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.

What is a Memory Corruption Vulnerability?

The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.

CVE-2019-5544 has been classified to as a Memory Corruption vulnerability or weakness.


Products Associated with CVE-2019-5544

You can be notified by stack.watch whenever vulnerabilities like CVE-2019-5544 are published in these products:

Openslp
 
VMware Horizon Daas
 
Red Hat Enterprise Linux Desktop
 
Red Hat Enterprise Linux Server
 
Red Hat Enterprise Linux Server Aus
 
Red Hat Enterprise Linux Server Eus
 
Red Hat Enterprise Linux Server Tus
 
Red Hat Enterprise Linux Workstation
 
VMware Esxi
 
Fedora Project Fedora
 

What versions are vulnerable to CVE-2019-5544?