Apache Sling Resource Merger: Excessive Iteration
CVE-2023-26513 is a high-severity excessive iteration vulnerability in Apache Sling Resource Merger from Apache, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version 1.4.2 as the first without the flaw, so updating Apache Sling Resource Merger to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.46% chance of exploitation within 30 days, higher than 74% of scored CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Apache Sling Resource Merger to 1.4.2 or a later version.
- Update Sling Resource Merger to 1.4.2 or a later version.
- Read the advisory on lists.apache.org 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 |
|---|---|---|---|
| Apache | Apache Sling Resource Merger | 1.2.0 up to, but not including, 1.4.2 | 1.4.2 |
| Apache | Sling Resource Merger | 1.2.0 up to, but not including, 1.4.2 | 1.4.2 |
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
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- NoneNo data is disclosed.
- Integrity
- NoneNothing can be modified.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.5 | High | CNA (apache.org) |
| CVSS 3.1 | 7.5 | High | NVD |
Official description
Excessive Iteration vulnerability in Apache Software Foundation Apache Sling Resource Merger.This issue affects Apache Sling Resource Merger: from 1.2.0 before 1.4.2.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Excessive Iteration
The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Recent Excessive Iteration vulnerabilities
- 7.5 High severity
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