CVEvulnerability

CVE-2021-32836

8.1 HIGH Published 2021-09-09 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-09-09
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:H
CVSS 3.1 ([email protected])
8.1 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.8 MEDIUM — AV:N/AC:M/Au:N/C:P/I:P/A:P
Weaknesses
CWE-502, CWE-94

Description

ZStack is open source IaaS(infrastructure as a service) software. In ZStack before versions 3.10.12 and 4.1.6 there is a pre-auth unsafe deserialization vulnerability in the REST API. An attacker in control of the request body will be able to provide both the class name and the data to be deserialized and therefore will be able to instantiate an arbitrary type and assign arbitrary values to its fields. This issue may lead to a Denial Of Service. If a suitable gadget is available, then an attacker may also be able to exploit this vulnerability to gain pre-auth remote code execution. For additional details see the referenced GHSL-2021-087.

Affected configurations

• zstack zstack (< 3.10.12) • zstack zstack (>= 4.1.0 < 4.1.6)

Related

Weakness · CWE (2)

  • CWE-502 Deserialization of Untrusted Data weakness
  • CWE-94 Improper Control of Generation of Code weakness

References