SAP NetWeaver Application Server ABAP: Improper Control of Dynamically-Identified Variables
CVE-2024-54198 is a high-severity improper control of dynamically-identified variables vulnerability in SAP NetWeaver Application Server ABAP from SAP, with a CVSS 3.1 base score of 8.5 out of 10. It can be exploited remotely over the network by an attacker with a low-privileged account, without any action from a user. Affected SAP NetWeaver Application Server ABAP versions: KRNL64NUC 7.22; 7.22EXT; KRNL64UC 7.22, and others listed below. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.6% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of SAP NetWeaver Application Server ABAP you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SAP | SAP NetWeaver Application Server ABAP | KRNL64NUC 7.22; 7.22EXT; KRNL64UC 7.22; 7.53; KERNEL 7.22; 7.54; 7.77; 7.89; and 1 more ranges | 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
- HighSuccess depends on conditions outside the attacker's control.
- Privileges required
- LowA basic user account is enough.
- 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:H/PR:L/UI:N/S:C/C:H/I:H/A:H. Scored by CNA (sap.com).
Official description
In certain conditions, SAP NetWeaver Application Server ABAP allows an authenticated attacker to craft a Remote Function Call (RFC) request to restricted destinations, which can be used to expose credentials for a remote service. These credentials can then be further exploited to completely compromise the remote service, potentially resulting in a significant impact on the confidentiality, integrity, and availability of the application.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Control of Dynamically-Identified Variables
The product does not properly restrict reading from or writing to dynamically-identified variables.
How developers prevent this class of flaw
- For any externally-influenced input, check the input against an allowlist of internal program variables that are allowed to be modified.
- Refactor the code so that internal program variables do not need to be dynamically identified.
More Improper Control of Dynamically-Identified Variables vulnerabilities (CWE-914)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in SAP NetWeaver Application Server ABAP
- 9.9 Critical severity
- 8.5 High severity
Recent Improper Control of Dynamically-Identified Variables vulnerabilities
- 8.0 High severity
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