CVE-2024-49761
Description
A flaw was found in the ReXML XML toolkit for Ruby. Parsing XML data containing a large number of digits between &# and x...; in a hex numeric character reference (&#x...;) can trigger a regular expression denial of service (ReDoS) condition, leading to a denial of service.
Statement
This vulnerability is rated as a moderate severity because it allows attackers to exploit inefficient regex parsing in hex numeric character references (&#x...;), causing a ReDoS and impacting availability, it requires specific malicious input but does not affect confidentiality or integrity.
Satellite employs multiple versions of ReXML in the Puppet Agent and Server components across varying versions of Satellite:
In Satellite 6.15 (on RHEL8), the Puppet Agent component uses ReXML version 7.28-0-1 and IS affected.
In Satellite 6.15 (on RHEL8), the Satellite server component uses ReXML version 7.17.2-1 and is NOT affected.
In Satellite 6.16 and 6.17 (on RHEL8 and RHEL9), the Puppet Agent component uses ReXML version 8.8.1-1 and is NOT affected.
In Satellite 6.16 and 6.17 (on RHEL8 and RHEL9), the Satellite server component uses ReXML version 8.6.2-2 and IS affected.
To reiterate, only the Puppet Agent component in Satellite 6.15 and the Satellite server component in Satellite 6.16 and 6.17 are affected. Any other component/Satellite version combinations are considered not-affected.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | None | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Resource Consumption (CPU)
Attackers can create crafted inputs that intentionally cause the regular expression to use excessive backtracking in a way that causes the CPU consumption to spike.
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