CVE-2025-64524
Description
A flaw was found in cups-filters. This vulnerability allows a heap buffer overflow and memory corruption, potentially leading to arbitrary code execution or a Denial of Service, via an unvalidated length parameter in the CompressData function of the rastertopclx filter. This can be exploited by an attacker with permissions to install a printer with a PPD (PostScript Printer Description) file or remotely via the CUPS (Common Unix Printing System) web interface.
Statement
Red Hat rates this Moderate. While the rastertopclx filter runs under the lp user, limiting direct root compromise, the vulnerability can be exploited remotely via the CUPS web interface by an attacker with low privileges to install a printer with a crafted PPD file. This could lead to a denial of service or potentially arbitrary code execution, impacting system availability.
Mitigation
To mitigate this issue, restrict network access to the CUPS service (port 631) to trusted networks only. This can be achieved by configuring firewall rules to limit inbound connections to port 631. Alternatively, disable remote administration of CUPS if not required. If the CUPS service is restarted or reloaded, ensure that the firewall rules or configuration changes persist.
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).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.4 | 5.5 | N/A |
| Attack Vector | Network | Local | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | Low | Low | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | Low | None | N/A |
| Integrity Impact | Low | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Buffer overflows often can be used to execute arbitrary code, which is usually outside the scope of the product's implicit security policy. This can often be used to subvert any other security service.
Availability
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU)
Buffer overflows generally lead to crashes. Other attacks leading to lack of availability are possible, including putting the product into an infinite loop.
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