Detection rules › Splunk

Ivanti EPMM Remote Unauthenticated API Access CVE-2023-35082

Status
production
Severity
medium
Group by
Web.src, Web.status, Web.url_length, c-uri, c-useragent, cs-host, cs-method
Author
Michael Haag, Splunk
Source
github.com/splunk/security_content

The following analytic detects potential unauthorized access attempts exploiting CVE-2023-35082 within Ivanti's software products. It identifies access to the specific URI path /mifs/asfV3/api/v2/ with an HTTP 200 response code in web access logs, indicating successful unauthorized access. This activity is significant for a SOC as it highlights potential security breaches that could lead to unauthorized data access or system modifications. If confirmed malicious, an attacker could gain unbridled access to sensitive organizational data or modify systems maliciously, posing severe security risks.

Known false positives

  • Similar to CVE-2023-35078, the path for exploitation indicates that status=200 is required for successful exploitation of the vulnerability. False positives may be present if status=200 is removed from the search. If it is removed,then the search also alert on status=301 and status=404 which indicates unsuccessful exploitation attempts. Analysts may find it useful to hunt for these status codes as well, but it is likely to produce a significant number of alerts as this is a widespread vulnerability.

MITRE ATT&CK coverage

Rule body

name: Ivanti EPMM Remote Unauthenticated API Access CVE-2023-35082
id: e03edeba-4942-470c-a664-27253f3ad351
version: 10
creation_date: '2023-08-08'
modification_date: '2026-05-13'
author: Michael Haag, Splunk
status: production
type: TTP
description: |-
    The following analytic detects potential unauthorized access attempts exploiting CVE-2023-35082 within Ivanti's software products.
    It identifies access to the specific URI path /mifs/asfV3/api/v2/ with an HTTP 200 response code in web access logs, indicating successful unauthorized access.
    This activity is significant for a SOC as it highlights potential security breaches that could lead to unauthorized data access or system modifications.
    If confirmed malicious, an attacker could gain unbridled access to sensitive organizational data or modify systems maliciously, posing severe security risks.
data_source:
    - Suricata
search: |-
    | tstats `security_content_summariesonly`
      count min(_time) as firstTime
            max(_time) as lastTime
    
    FROM datamodel=Web WHERE
    
    Web.url="*/mifs/asfV3/api/v2/*"
    Web.status=200
    
    BY Web.http_user_agent Web.status Web.http_method
       Web.url Web.url_length Web.src Web.dest
    
    | `drop_dm_object_name("Web")`
    | `security_content_ctime(firstTime)`
    | `security_content_ctime(lastTime)`
    | `ivanti_epmm_remote_unauthenticated_api_access_cve_2023_35082_filter`
how_to_implement: |-
    To implement this analytic, a network product similar to Suricata or Palo Alto needs to be mapped to the Web datamodel. Modify accordingly to work with your products.
known_false_positives: |-
    Similar to CVE-2023-35078, the path for exploitation indicates that status=200 is required for successful exploitation of the vulnerability.
    False positives may be present if status=200 is removed from the search.
    If it is removed,then the search also alert on status=301 and status=404 which indicates unsuccessful exploitation attempts.
    Analysts may find it useful to hunt for these status codes as well, but it is likely to produce a significant number of alerts as this is a widespread vulnerability.
references:
    - https://forums.ivanti.com/s/article/CVE-2023-35082-Remote-Unauthenticated-API-Access-Vulnerability-in-MobileIron-Core-11-2-and-older?language=en_US
    - https://github.com/vchan-in/CVE-2023-35078-Exploit-POC/blob/main/cve_2023_35078_poc.py
    - https://www.rapid7.com/blog/post/2023/08/02/cve-2023-35082-mobileiron-core-unauthenticated-api-access-vulnerability/
finding:
    title: Potential CVE-2023-35082 against an Ivanti EPMM appliance on $dest$.
    entity:
        field: dest
        type: system
        score: 50
analytic_story:
    - Ivanti EPMM Remote Unauthenticated Access
asset_type: Web Server
cve:
    - CVE-2023-35082
mitre_attack_id:
    - T1190
    - T1133
product:
    - Splunk Enterprise
    - Splunk Enterprise Security
    - Splunk Cloud
category: web
security_domain: network

Stages and Predicates

Stage 1: tstats

| tstats `security_content_summariesonly`
  count min(_time) as firstTime
        max(_time) as lastTime

FROM datamodel=Web WHERE

Web.url="*/mifs/asfV3/api/v2/*"
Web.status=200

BY Web.http_user_agent Web.status Web.http_method
   Web.url Web.url_length Web.src Web.dest

Stage 2: search

| `drop_dm_object_name("Web")`

Stage 3: search

| `security_content_ctime(firstTime)`

Stage 4: search

| `security_content_ctime(lastTime)`

Stage 5: search

| `ivanti_epmm_remote_unauthenticated_api_access_cve_2023_35082_filter`

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Web.statuseq
  • 200
field:"Web.status" kind:eq value:"200"
Web.urleq
  • "*/mifs/asfV3/api/v2/*"
field:"c-uri" kind:eq