CyberSecBulletin
CVE-2022-22947Exploited in the wildNVD status: Analyzed

VMware Spring Cloud Gateway Code Injection

Published Updated By the CyberSecBulletin desk

CVE-2022-22947 is a critical-severity improper neutralization of special elements used in an expression language statement vulnerability in Spring Cloud Gateway, with a CVSS 3.1 base score of 10.0 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. CISA added it to the Known Exploited Vulnerabilities catalogue on May 16, 2022, which means attacks have been observed in the wild.

Patch now

Attackers are already exploiting this vulnerability, according to CISA.

What to do

  1. Check which version of Spring Cloud Gateway you run against the affected versions below, and install the vendor's latest release.
  2. CISA's required action: Apply updates per vendor instructions.
  3. Read the advisory on tanzu.vmware.com for workarounds and exact fixed builds.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
Spring Cloud GatewaySpring Cloud GatewayNot specified in the recordNot stated
OracleCommerce Guided Search11.3.2Not stated
OracleCommunications Cloud Native Core Binding Support Function1.11.0; 22.1.3Not stated
OracleCommunications Cloud Native Core Console22.2.0Not stated
OracleCommunications Cloud Native Core Network Exposure Function22.1.0Not stated
OracleCommunications Cloud Native Core Network Function Cloud Native Environment1.10.0Not stated
OracleCommunications Cloud Native Core Network Repository Function1.15.0; 1.15.1; 22.1.2; 22.2.0Not stated
OracleCommunications Cloud Native Core Network Slice Selection Function1.8.0; 22.1.0Not stated
OracleCommunications Cloud Native Core Security Edge Protection Proxy22.1.1Not stated
OracleCommunications Cloud Native Core Service Communication Proxy1.15.0Not stated

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
ChangedThe attack can reach beyond the vulnerable component into other systems.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.110.0CriticalNVD
CVSS 3.110.0CriticalCISA (ADP)
CVSS 2.06.8MediumNVD

Official description

In spring cloud gateway versions prior to 3.1.1+ and 3.0.7+ , applications are vulnerable to a code injection attack when the Gateway Actuator endpoint is enabled, exposed and unsecured. A remote attacker could make a maliciously crafted request that could allow arbitrary remote execution on the remote host.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Neutralization of Special Elements used in an Expression Language Statement

The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.

How developers prevent this class of flaw

  • Avoid adding user-controlled data into an expression interpreter when possible.
  • If user-controlled data must be added to an expression interpreter, one or more of the following should be performed: Validate that the user input will not evaluate as an expression Encode the user input in a way that ensures it is not evaluated as an expression
  • The framework or tooling might allow the developer to disable or deactivate the processing of EL expressions, such as setting the isELIgnored attribute for a JSP page to true.

More Improper Neutralization of Special Elements used in an Expression Language Statement vulnerabilities (CWE-917)

Timeline

  1. CVE record published.
  2. Added to CISA's Known Exploited Vulnerabilities catalogue.
  3. Deadline for US federal agencies to remediate, set by CISA.
  4. CISA published its SSVC assessment (exploitation: active, automatable: yes, technical impact: total).
  5. Record last changed materially (score, affected products, status or references).

References

Patches and release notes

Third-party and government advisories

Technical write-ups (may include proof of concept)

Recent Improper Neutralization of Special Elements used in an Expression Language Statement vulnerabilities

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