Vulnerability Name:

CVE-2021-32827 (CCN-207920)

Assigned:2021-07-21
Published:2021-07-21
Updated:2022-07-02
Summary:MockServer is open source software which enables easy mocking of any system you integrate with via HTTP or HTTPS. An attacker that can trick a victim into visiting a malicious site while running MockServer locally, will be able to run arbitrary code on the MockServer machine. With an overly broad default CORS configuration MockServer allows any site to send cross-site requests. Additionally, MockServer allows you to create dynamic expectations using Javascript or Velocity templates. Both engines may allow an attacker to execute arbitrary code on-behalf of MockServer. By combining these two issues (Overly broad CORS configuration + Script injection), an attacker could serve a malicious page so that if a developer running MockServer visits it, they will get compromised. For more details including a PoC see the referenced GHSL-2021-059.
CVSS v3 Severity:9.6 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)
8.7 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
6.1 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N)
5.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N/E:P/RL:U/RC:R)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:6.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
4.9 Medium (CCN CVSS v2 Vector: AV:N/AC:H/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-79
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2021-32827

Source: XF
Type: UNKNOWN
mockserver-cve202132827-code-exec(207920)

Source: CCN
Type: mockserver GIT Repository
Security Issue: Request for contact #1004

Source: CCN
Type: GHSL-2021-059
Arbitrary code execution in MockServer - CVE-2021-32827

Source: CONFIRM
Type: Exploit, Third Party Advisory
https://securitylab.github.com/advisories/GHSL-2021-059-mockserver/

Source: CCN
Type: Oracle CPUJan2022
Oracle Critical Patch Update Advisory - January 2022

Source: MISC
Type: Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpujan2022.html

Vulnerable Configuration:Configuration 1:
  • cpe:/a:mock-server:mockserver:*:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:mock-server:mockserver:5.11.2:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    mock-server mockserver *
    oracle communications cloud native core policy 1.14.0
    mock-server mockserver 5.11.2