SAP Web Dispatcher: Incomplete Filtering of Special Elements
CVE-2024-47590 is a high-severity incomplete filtering of special elements vulnerability in SAP Web Dispatcher from SAP, with a CVSS 3.1 base score of 8.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. Affected SAP Web Dispatcher versions: WEBDISP 7.77; 7.89; 7.93, 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 0.81% chance of exploitation within 30 days, higher than 57% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of SAP Web Dispatcher you run against the affected versions below, and install the vendor's latest release.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
- Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| SAP | SAP Web Dispatcher | WEBDISP 7.77; 7.89; 7.93; KERNEL 7.77; 9.12; 9.13 | Not stated |
| SAP | web_dispatcher | 7.89; 7.93; kernel_7.77; 9.12; 9.13; webdisp_7.77 | 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
- RequiredA user must take an action such as opening a file or link.
- Scope
- UnchangedImpact stays within the vulnerable component.
- 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:R/S:U/C:H/I:H/A:H. Scored by CNA (sap.com).
Official description
An unauthenticated attacker can create a malicious link which they can make publicly available. When an authenticated victim clicks on this malicious link, input data will be used by the web site page generation to create content which when executed in the victim's browser (XXS) or transmitted to another server (SSRF) gives the attacker the ability to execute arbitrary code on the server fully compromising confidentiality, integrity and availability.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incomplete Filtering of Special Elements
The product receives data from an upstream component, but it does not completely filter special elements before sending it to a downstream component.
More Incomplete Filtering of Special Elements vulnerabilities (CWE-791)
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 Web Dispatcher
- 10.0 Critical severity
- 7.7 High severity
- 9.8 Critical severity
- 7.5 High severity
- 9.4 Critical severity
- 9.4 Critical severity
Recent Incomplete Filtering of Special Elements vulnerabilities
- 7.8 High severity
- 7.4 High severity
- 8.6 High severity
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