SB2017121910 - Multiple vulnerabilities in VmWare products

Description

This security bulletin contains information about 4 vulnerabilities.

1) Privilege escalation (CVE-ID: CVE-2017-4943)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists in VMware vCenter Server Appliance due to a flaw in the 'showlog' plugin. A local attacker can gain root level privileges over the appliance base OS.

2) Stored cross-site scripting (CVE-ID: CVE-2017-4940)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

3) Type confusion (CVE-ID: CVE-2017-4941)

CWE-ID: CWE-843 - Type confusion

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in the remote management functionality due to improper handling of Virtual Network Computing (VNC) packets. A remote attacker can send a series of VNC packets, cause a type confusion and stack overwrite to execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

4) Heap-based buffer overflow (CVE-ID: CVE-2017-4933)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists in the remote management functionality due to improper handling of Virtual Network Computing (VNC) packets. A remote attacker can send a series of VNC packets, cause heap-based buffer overflow to execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://www.vmware.com/security/advisories/VMSA-2017-0021.html