Vulnerability in VMware Installbuilder

CVE-2021-22037

Under certain circumstances, when manipulating the Windows registry, InstallBuilder uses the reg.exe system command. The full path to the command is not enforced, which results in a search in the search path until a binary can be identified. This makes the installer/uninstaller vulnerable to Path Interception by Search Order Hijacking, potentially allowing an attacker to plant a malicious reg.exe command so it takes precedence over the system command. The vulnerability only affects Windows installers.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.003 (19.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-22037: held from 0.003 to 0.003.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

  • VMware Installbuilder
  • VMware Installbuilder — versions All InstallBuilder versions prior to version 21.6.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-22037?
CVE-2021-22037 is a high-severity vulnerability in VMware Installbuilder, classified under Uncontrolled Search Path Element. CVSS score: 7.8/10. Published 2021-10-29.
How severe is CVE-2021-22037?
High severity. CVSS v3 base score is 7.8 out of 10.