VMWare addressed severe Code Execution vulnerabilities in several products
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2017-4933 | VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authe VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall. NVD description · AI analysis pending | 8.8 | 4% |
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| CVE-2017-4940 | The ESXi Host Client in VMware ESXi (6.5 before ESXi650-201712103-SG, 5.5 before ESXi600-201711103-SG and 5.5 before ESXi550-201709102-SG) contains a vulnerabil The ESXi Host Client in VMware ESXi (6.5 before ESXi650-201712103-SG, 5.5 before ESXi600-201711103-SG and 5.5 before ESXi550-201709102-SG) contains a vulnerability that may allow for stored cross-site scripting (XSS). An attacker can exploit this vulnerability by injecting Javascript, which might get executed when other users access the Host Client. NVD description · AI analysis pending | 6.1 | <1% |
| — | ||
| CVE-2017-4941 | VMware ESXi (6.0 before ESXi600-201711101-SG, 5.5 ESXi550-201709101-SG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability VMware ESXi (6.0 before ESXi600-201711101-SG, 5.5 ESXi550-201709101-SG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a stack overflow via a specific set of VNC packets. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall. NVD description · AI analysis pending | 8.8 | 3% |
| — | ||
| CVE-2017-4943 | VMware vCenter Server Appliance (vCSA) (6.5 before 6.5 U1d) contains a local privilege escalation vulnerability via the 'showlog' plugin. VMware vCenter Server Appliance (vCSA) (6.5 before 6.5 U1d) contains a local privilege escalation vulnerability via the 'showlog' plugin. Successful exploitation of this issue could result in a low privileged user gaining root level privileges over the appliance base OS. NVD description · AI analysis pending | 7.8 | <1% |
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Full article500 words · extracted from securityaffairs.com · click to collapse
VMware has released security updates to address four vulnerabilities in its ESXi, vCenter Server Appliance (vCSA), Workstation and Fusion products.
The flaws were addressed with the release of six patches for ESXi, version 12.5.8 of Workstation, version 8.5.9 of Fusion, and version 6.5 U1d of vCSA.
Some of the flaws could be exploited by an attacker for arbitrary code execution.
Security experts from Cisco Talos group discovered two of the code execution vulnerabilities that ranked as critical and assigned them a CVSS score of 9.0, while VMware classified them as having “important” severity. The flaws analyzed by the Talos group affects the VNC implementation in VMWare products used to allow remote access to the solutions.
“Today, Talos is disclosing a pair of vulnerabilities in the VNC implementation used in VMWare’s products that could result in code execution. VMWare implements VNC for its remote management, remote access, and automation purposes in VMWare products including Workstation, Player, and ESXi which share a common VMW VNC code base. The vulnerabilities manifest themselves in a way that would allow an attacker to initiate of VNC session causing the vulnerabilities to be triggered.” reads the security advisory published by CISCO.
The vulnerability CVE-2017-4941 resides in the remote management functionality of VMWare, it could be exploited by a remote attacker to execute code in a virtual machine via an authenticated virtual network computing (VNC) session.
“A specially crafted set of VNC packets can cause a type confusion resulting in stack overwrite, which could lead to code execution.” reads the advisory published by Cisco Talos.
The second issue discovered by Cisco Talos is a heap overflow bug tracked as CVE-2017-4933 that could be triggered by an attacker to execute arbitrary code in a virtual machine using specially crafted VNC packets.
“An exploitable code execution vulnerability exists in the remote management functionality of VMware . A specially crafted set of VNC packets can cause a heap overflow resulting in heap corruption. An attacker can create a VNC session to trigger this vulnerability.” states Cisco Talos in the security advisory.
VMware hasn’t classified the flaws as critical because it argued that their exploitation is possible in ESXi only if VNC is manually enabled in the VM’s configuration file and the application is set to allow VNC traffic through the built-in firewall.
VMware also patched a stored cross-site scripting (XSS) flaw tracked as CVE-2017-4940 and affecting the ESXi Host Client, the issued could be exploited to inject code that gets executed when users access the Host Client. The company credited the expert Alain Homewood from Insomnia Security for its discovery.
The fourth flaw addressed by VMWare is a privilege escalation affecting vCSA that is tracked as CVE-2017-4943. The vulnerability was discovered by Lukasz Plonka and resides in the showlog plugin, it could be exploited by an attacker with low privileges to obtain root level access to the appliance’s base operating system.
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(Security Affairs – Code Execution flaws, VMWare)
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Text extracted automatically; images, tables and formatting may be missing. Original: https://securityaffairs.com/66997/security/vmware-code-execution-flaws.html