CyberSecBulletin
CVE-2023-47211NVD status: Modified

OpManager: Improper Limitation of a Pathname to a Restricted Directory

Published Updated By the CyberSecBulletin desk

CVE-2023-47211 is a high-severity improper limitation of a pathname to a restricted directory vulnerability in OpManager from ManageEngine, with a CVSS 3.1 base score of 8.6 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected OpManager versions: 12.7.258. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 47% chance of exploitation within 30 days, which is in the top 1.15% of all scored CVEs.

Patch this week

EPSS places it among the vulnerabilities most likely to be exploited soon.

What to do

  1. Update Manageengine Firewall Analyzer to 12.7 or a later version.
  2. Update Manageengine Netflow Analyzer to 12.7 or a later version.
  3. Update Manageengine Network Configuration Manager to 12.7 or a later version.
  4. Read the advisory on manageengine.com for workarounds and exact fixed builds.
  5. 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
ManageEngineOpManager12.7.258Not stated
ZohoManageengine Firewall Analyzerbefore 12.7; 12.712.7
ZohoManageengine Netflow Analyzerbefore 12.7; 12.712.7
ZohoManageengine Network Configuration Managerbefore 12.7; 12.712.7
ZohoManageengine Opmanagerbefore 12.7; 12.712.7
ZohoManageengine Opmanager Mspbefore 12.7; 12.712.7
ZohoManageengine Opmanager Plusbefore 12.7; 12.712.7
ZohoManageengine Oputilsbefore 12.7; 12.712.7

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
NoneNo data is disclosed.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

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

Scoring systemScoreSeverityScored by
CVSS 3.19.1CriticalCNA (cisco.com)
CVSS 3.18.6HighNVD

Official description

A directory traversal vulnerability exists in the uploadMib functionality of ManageEngine OpManager 12.7.258. A specially crafted HTTP request can lead to arbitrary file creation. An attacker can send a malicious MiB file to trigger this vulnerability.

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

The underlying weakness: Improper Limitation of a Pathname to a Restricted Directory

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

How developers prevent this class of flaw

  • For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
  • Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth.

More Improper Limitation of a Pathname to a Restricted Directory vulnerabilities (CWE-22)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: poc, automatable: no, technical impact: partial).
  3. Record last changed materially (score, affected products, status or references).

References

Technical write-ups (may include proof of concept)

Other vulnerabilities in OpManager

All OpManager vulnerabilities

Recent Improper Limitation of a Pathname to a Restricted Directory vulnerabilities

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