ICS: Improper Restriction of XML External Entity Reference
CVE-2024-22024 is a high-severity improper restriction of XML external entity reference vulnerability in ICS from Ivanti, with a CVSS 3.1 base score of 8.3 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists versions 9.1R14.5, 9.1R17.3, 9.1R18.4 as the first without the flaw, so updating ICS to one of those releases or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 94.7% chance of exploitation within 30 days, which is in the top 0.14% of all scored CVEs.
Exploitation in the next 30 days is more likely than not, according to EPSS.
What to do
- Update ICS to 9.1R14.5 or 9.1R17.3 or 9.1R18.4 or 22.1R6.1, whichever matches your release line, or a later version.
- Update ICS to 9.1R15.3 or a later version.
- Update IPS to 9.1R18.4 or 9.1R17.3 or 22.5R1.2, whichever matches your release line, or a later version.
- Read the advisory on forums.ivanti.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Ivanti | ICS | 9.1R14.5 up to, but not including, 9.1R14.5; 9.1R17.3 up to, but not including, 9.1R17.3; 9.1R18.4 up to, but not including, 9.1R18.4; 22.1R6.1 up to, but not including, 22.1R6.1; 22.2R4.1 up to, but not including, 22.2R4.1; 22.3R1.1 up to, but not including, 22.3R1.1; 22.4R1.1 up to, but not including, 22.4R1.1; 22.5R1.2 up to, but not including, 22.5R1.2; and 4 more ranges | 9.1R14.5, 9.1R17.3, 9.1R18.4, 22.1R6.1, 22.2R4.1, 22.3R1.1 |
| Ivant | ICS | 9.1R15.3 up to, but not including, 9.1R15.3 | 9.1R15.3 |
| Ivanti | IPS | 9.1R18.4 up to, but not including, 9.1R18.4; 9.1R17.3 up to, but not including, 9.1R17.3; 22.5R1.2 up to, but not including, 22.5R1.2 | 9.1R18.4, 9.1R17.3, 22.5R1.2 |
| Ivanti | Connect Secure | 9.1; 22.4; 22.5 | Not stated |
| Ivanti | Policy Secure | 22.5 | Not stated |
| Ivanti | Zero Trust Access Gateway | 22.6 | Not 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
- LowSome restricted data can be read.
- Integrity
- LowLimited modification of data is possible.
- Availability
- LowPerformance or availability is reduced.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 8.3 | High | NVD |
| CVSS 3.0 | 8.3 | High | CNA (hackerone.com) |
Official description
An XML external entity or XXE vulnerability in the SAML component of Ivanti Connect Secure (9.x, 22.x), Ivanti Policy Secure (9.x, 22.x) and ZTA gateways which allows an attacker to access certain restricted resources without authentication.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Restriction of XML External Entity Reference
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
How developers prevent this class of flaw
- Many XML parsers and validators can be configured to disable external entity expansion.
More Improper Restriction of XML External Entity Reference vulnerabilities (CWE-611)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in ICS
- 8.2 High severity
- 8.8 High severity
- 9.1 Critical severity
- 8.2 High severity
Recent Improper Restriction of XML External Entity Reference vulnerabilities
- 7.5 High severity
- 7.1 High severity
- 7.5 High severity
- 9.8 Critical severity
- 7.5 High severity
- 7.5 High severity
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