RHEL OpenPrinting cups-filters (RHSB-2024:002)

critical Nessus Plugin ID 207865

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Synopsis

The remote Red Hat host is using a potentially vulnerable service.

Description

The remote Redhat Enterprise Linux host has a package installed that is affected by the vulnerabilities as referenced in the RHSB-2024:002 advisory.

- CUPS is a standards-based, open-source printing system, and `libcupsfilters` contains the code of the filters of the former `cups-filters` package as library functions to be used for the data format conversion tasks needed in Printer Applications. The `cfGetPrinterAttributes5` function in `libcupsfilters` does not sanitize IPP attributes returned from an IPP server. When these IPP attributes are used, for instance, to generate a PPD file, this can lead to attacker controlled data to be provided to the rest of the CUPS system. (CVE-2024-47076)

- CUPS is a standards-based, open-source printing system, and `libppd` can be used for legacy PPD file support. The `libppd` function `ppdCreatePPDFromIPP2` does not sanitize IPP attributes when creating the PPD buffer. When used in combination with other functions such as `cfGetPrinterAttributes5`, can result in user controlled input and ultimately code execution via Foomatic. This vulnerability can be part of an exploit chain leading to remote code execution (RCE), as described in CVE-2024-47176. (CVE-2024-47175)

- CUPS is a standards-based, open-source printing system, and `cups-browsed` contains network printing functionality including, but not limited to, auto-discovering print services and shared printers.
`cups-browsed` binds to `INADDR_ANY:631`, causing it to trust any packet from any source, and can cause the `Get-Printer-Attributes` IPP request to an attacker controlled URL. Due to the service binding to `*:631 ( INADDR_ANY )`, multiple bugs in `cups-browsed` can be exploited in sequence to introduce a malicious printer to the system. This chain of exploits ultimately enables an attacker to execute arbitrary commands remotely on the target machine without authentication when a print job is started. This poses a significant security risk over the network. Notably, this vulnerability is particularly concerning as it can be exploited from the public internet, potentially exposing a vast number of systems to remote attacks if their CUPS services are enabled. (CVE-2024-47176)

- CUPS is a standards-based, open-source printing system, and cups-filters provides backends, filters, and other software for CUPS 2.x to use on non-Mac OS systems. Any value passed to `FoomaticRIPCommandLine` via a PPD file will be executed as a user controlled command. When combined with other logic bugs as described in CVE_2024-47176, this can lead to remote command execution. (CVE-2024-47177)

Solution

Follow the guidence from RHSB-2024:002

Plugin Details

Severity: Critical

ID: 207865

File Name: redhat-RHSB-2024-002.nbin

Version: 1.9

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 9/27/2024

Updated: 11/12/2024

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 6

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2024-47177

CVSS v3

Risk Factor: Critical

Base Score: 9

Temporal Score: 8.1

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux, cpe:/o:redhat:rhel_eus

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 9/26/2024

Reference Information

CVE: CVE-2024-47076, CVE-2024-47175, CVE-2024-47176, CVE-2024-47177

Detections

Analytics