Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2020-3995

Missing Release of Memory after Effective Lifetime

Published: Oct 20, 2020 | Modified: Oct 30, 2020
CVSS 3.x
5.3
MEDIUM
Source:
NVD
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
3.5 LOW
AV:N/AC:M/Au:S/C:N/I:N/A:P
RedHat/V2
RedHat/V3
Ubuntu
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-3995
CWEhttps://cwe.mitre.org/data/definitions/401.html

In VMware ESXi (6.7 before ESXi670-201908101-SG, 6.5 before ESXi650-202007101-SG), Workstation (15.x before 15.1.0), Fusion (11.x before 11.1.0), the VMCI host drivers used by VMware hypervisors contain a memory leak vulnerability. A malicious actor with access to a virtual machine may be able to trigger a memory leak issue resulting in memory resource exhaustion on the hypervisor if the attack is sustained for extended periods of time.

Weakness

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

Affected Software

Name Vendor Start Version End Version
Esxi Vmware 6.7 (including) 6.7 (including)
Esxi Vmware 6.7-670-201806001 (including) 6.7-670-201806001 (including)
Esxi Vmware 6.7-670-201807001 (including) 6.7-670-201807001 (including)
Esxi Vmware 6.7-670-201808001 (including) 6.7-670-201808001 (including)
Esxi Vmware 6.7-670-201810001 (including) 6.7-670-201810001 (including)
Esxi Vmware 6.7-670-201810101 (including) 6.7-670-201810101 (including)
Esxi Vmware 6.7-670-201810102 (including) 6.7-670-201810102 (including)
Esxi Vmware 6.7-670-201810103 (including) 6.7-670-201810103 (including)
Esxi Vmware 6.7-670-201810201 (including) 6.7-670-201810201 (including)
Esxi Vmware 6.7-670-201810202 (including) 6.7-670-201810202 (including)
Esxi Vmware 6.7-670-201810203 (including) 6.7-670-201810203 (including)
Esxi Vmware 6.7-670-201810204 (including) 6.7-670-201810204 (including)
Esxi Vmware 6.7-670-201810205 (including) 6.7-670-201810205 (including)
Esxi Vmware 6.7-670-201810206 (including) 6.7-670-201810206 (including)
Esxi Vmware 6.7-670-201810207 (including) 6.7-670-201810207 (including)
Esxi Vmware 6.7-670-201810208 (including) 6.7-670-201810208 (including)
Esxi Vmware 6.7-670-201810209 (including) 6.7-670-201810209 (including)
Esxi Vmware 6.7-670-201810210 (including) 6.7-670-201810210 (including)
Esxi Vmware 6.7-670-201810211 (including) 6.7-670-201810211 (including)
Esxi Vmware 6.7-670-201810212 (including) 6.7-670-201810212 (including)
Esxi Vmware 6.7-670-201810213 (including) 6.7-670-201810213 (including)
Esxi Vmware 6.7-670-201810214 (including) 6.7-670-201810214 (including)
Esxi Vmware 6.7-670-201810215 (including) 6.7-670-201810215 (including)
Esxi Vmware 6.7-670-201810216 (including) 6.7-670-201810216 (including)
Esxi Vmware 6.7-670-201810217 (including) 6.7-670-201810217 (including)
Esxi Vmware 6.7-670-201810218 (including) 6.7-670-201810218 (including)
Esxi Vmware 6.7-670-201810219 (including) 6.7-670-201810219 (including)
Esxi Vmware 6.7-670-201810220 (including) 6.7-670-201810220 (including)
Esxi Vmware 6.7-670-201810221 (including) 6.7-670-201810221 (including)
Esxi Vmware 6.7-670-201810222 (including) 6.7-670-201810222 (including)
Esxi Vmware 6.7-670-201810223 (including) 6.7-670-201810223 (including)
Esxi Vmware 6.7-670-201810224 (including) 6.7-670-201810224 (including)
Esxi Vmware 6.7-670-201810225 (including) 6.7-670-201810225 (including)
Esxi Vmware 6.7-670-201810226 (including) 6.7-670-201810226 (including)
Esxi Vmware 6.7-670-201810227 (including) 6.7-670-201810227 (including)
Esxi Vmware 6.7-670-201810228 (including) 6.7-670-201810228 (including)
Esxi Vmware 6.7-670-201810229 (including) 6.7-670-201810229 (including)
Esxi Vmware 6.7-670-201810230 (including) 6.7-670-201810230 (including)
Esxi Vmware 6.7-670-201810231 (including) 6.7-670-201810231 (including)
Esxi Vmware 6.7-670-201810232 (including) 6.7-670-201810232 (including)
Esxi Vmware 6.7-670-201810233 (including) 6.7-670-201810233 (including)
Esxi Vmware 6.7-670-201810234 (including) 6.7-670-201810234 (including)
Esxi Vmware 6.7-670-201811001 (including) 6.7-670-201811001 (including)
Esxi Vmware 6.7-670-201901001 (including) 6.7-670-201901001 (including)
Esxi Vmware 6.7-670-201901401 (including) 6.7-670-201901401 (including)
Esxi Vmware 6.7-670-201901402 (including) 6.7-670-201901402 (including)
Esxi Vmware 6.7-670-201901403 (including) 6.7-670-201901403 (including)
Esxi Vmware 6.7-670-201903001 (including) 6.7-670-201903001 (including)
Esxi Vmware 6.7-670-201904001 (including) 6.7-670-201904001 (including)
Esxi Vmware 6.7-670-201904201 (including) 6.7-670-201904201 (including)
Esxi Vmware 6.7-670-201904201-ug (including) 6.7-670-201904201-ug (including)
Esxi Vmware 6.7-670-201904202 (including) 6.7-670-201904202 (including)
Esxi Vmware 6.7-670-201904202-ug (including) 6.7-670-201904202-ug (including)
Esxi Vmware 6.7-670-201904203 (including) 6.7-670-201904203 (including)
Esxi Vmware 6.7-670-201904203-ug (including) 6.7-670-201904203-ug (including)
Esxi Vmware 6.7-670-201904204 (including) 6.7-670-201904204 (including)
Esxi Vmware 6.7-670-201904204-ug (including) 6.7-670-201904204-ug (including)
Esxi Vmware 6.7-670-201904205 (including) 6.7-670-201904205 (including)
Esxi Vmware 6.7-670-201904205-ug (including) 6.7-670-201904205-ug (including)
Esxi Vmware 6.7-670-201904206 (including) 6.7-670-201904206 (including)
Esxi Vmware 6.7-670-201904206-ug (including) 6.7-670-201904206-ug (including)
Esxi Vmware 6.7-670-201904207 (including) 6.7-670-201904207 (including)
Esxi Vmware 6.7-670-201904207-ug (including) 6.7-670-201904207-ug (including)
Esxi Vmware 6.7-670-201904208 (including) 6.7-670-201904208 (including)
Esxi Vmware 6.7-670-201904208-ug (including) 6.7-670-201904208-ug (including)
Esxi Vmware 6.7-670-201904209 (including) 6.7-670-201904209 (including)
Esxi Vmware 6.7-670-201904209-ug (including) 6.7-670-201904209-ug (including)
Esxi Vmware 6.7-670-201904210 (including) 6.7-670-201904210 (including)
Esxi Vmware 6.7-670-201904210-ug (including) 6.7-670-201904210-ug (including)
Esxi Vmware 6.7-670-201904211 (including) 6.7-670-201904211 (including)
Esxi Vmware 6.7-670-201904211-ug (including) 6.7-670-201904211-ug (including)
Esxi Vmware 6.7-670-201904212 (including) 6.7-670-201904212 (including)
Esxi Vmware 6.7-670-201904212-ug (including) 6.7-670-201904212-ug (including)
Esxi Vmware 6.7-670-201904213 (including) 6.7-670-201904213 (including)
Esxi Vmware 6.7-670-201904213-ug (including) 6.7-670-201904213-ug (including)
Esxi Vmware 6.7-670-201904214 (including) 6.7-670-201904214 (including)
Esxi Vmware 6.7-670-201904214-ug (including) 6.7-670-201904214-ug (including)
Esxi Vmware 6.7-670-201904215 (including) 6.7-670-201904215 (including)
Esxi Vmware 6.7-670-201904215-ug (including) 6.7-670-201904215-ug (including)
Esxi Vmware 6.7-670-201904216 (including) 6.7-670-201904216 (including)
Esxi Vmware 6.7-670-201904216-ug (including) 6.7-670-201904216-ug (including)
Esxi Vmware 6.7-670-201904217 (including) 6.7-670-201904217 (including)
Esxi Vmware 6.7-670-201904217-ug (including) 6.7-670-201904217-ug (including)
Esxi Vmware 6.7-670-201904218 (including) 6.7-670-201904218 (including)
Esxi Vmware 6.7-670-201904218-ug (including) 6.7-670-201904218-ug (including)
Esxi Vmware 6.7-670-201904219 (including) 6.7-670-201904219 (including)
Esxi Vmware 6.7-670-201904219-ug (including) 6.7-670-201904219-ug (including)
Esxi Vmware 6.7-670-201904220 (including) 6.7-670-201904220 (including)
Esxi Vmware 6.7-670-201904220-ug (including) 6.7-670-201904220-ug (including)
Esxi Vmware 6.7-670-201904221 (including) 6.7-670-201904221 (including)
Esxi Vmware 6.7-670-201904221-ug (including) 6.7-670-201904221-ug (including)
Esxi Vmware 6.7-670-201904222 (including) 6.7-670-201904222 (including)
Esxi Vmware 6.7-670-201904222-ug (including) 6.7-670-201904222-ug (including)
Esxi Vmware 6.7-670-201904223 (including) 6.7-670-201904223 (including)
Esxi Vmware 6.7-670-201904223-ug (including) 6.7-670-201904223-ug (including)
Esxi Vmware 6.7-670-201904224 (including) 6.7-670-201904224 (including)
Esxi Vmware 6.7-670-201904224-ug (including) 6.7-670-201904224-ug (including)
Esxi Vmware 6.7-670-201904225 (including) 6.7-670-201904225 (including)
Esxi Vmware 6.7-670-201904225-ug (including) 6.7-670-201904225-ug (including)
Esxi Vmware 6.7-670-201904226 (including) 6.7-670-201904226 (including)
Esxi Vmware 6.7-670-201904226-ug (including) 6.7-670-201904226-ug (including)
Esxi Vmware 6.7-670-201904227 (including) 6.7-670-201904227 (including)
Esxi Vmware 6.7-670-201904227-ug (including) 6.7-670-201904227-ug (including)
Esxi Vmware 6.7-670-201904228 (including) 6.7-670-201904228 (including)
Esxi Vmware 6.7-670-201904228-ug (including) 6.7-670-201904228-ug (including)
Esxi Vmware 6.7-670-201904229 (including) 6.7-670-201904229 (including)
Esxi Vmware 6.7-670-201904229-ug (including) 6.7-670-201904229-ug (including)
Esxi Vmware 6.7-670-201905001 (including) 6.7-670-201905001 (including)
Esxi Vmware 6.7-670-201906002 (including) 6.7-670-201906002 (including)
Esxi Vmware 6.7-670-201908101 (including) 6.7-670-201908101 (including)

Potential Mitigations

  • Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
  • For example, glibc in Linux provides protection against free of invalid pointers.
  • When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
  • To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.

References

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