CVE-2024-50299
Description
A flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) subsystem. Due to improper chunk size validation when handling out-of-the-blue packets in the sctp_sf_ootb() function, the kernel can read uninitialized memory. An attacker could exploit this vulnerability by sending specially crafted SCTP packets, causing a kernel crash and resulting in a denial of service (DoS).
Mitigation
To mitigate this issue, prevent the sctp kernel module from being loaded:
1. Create a configuration file to disable autoloading:
echo "install sctp /bin/true" > /etc/modprobe.d/sctp.conf
2. If the sctp module is not currently in use, unload it from memory:
modprobe -r sctpAlternatively, reboot the system to ensure the module is completely unloaded.
Warning: If the module is actively in use, unloading it may fail or disrupt network connections, and a system reboot will be required for changes to take effect.
Caveat: Disabling the SCTP module will prevent any network services or applications that rely on the SCTP protocol from establishing connections.
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 | 5.5 | 5.5 | 5.5 |
| Attack Vector | Local | Local | Local |
| Attack Complexity | Low | Low | Low |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | None | None | None |
| Integrity Impact | None | None | None |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
cve.org: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory; Read Application Data
When reusing a resource such as memory or a program variable, the original contents of that resource may not be cleared before it is sent to an untrusted party.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
The uninitialized resource may contain values that cause program flow to change in ways that the programmer did not intend.
Frequently Asked Questions
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