CVE-2024-50083
Description
A flaw was found in the Linux kernel's Multipath TCP (MPTCP) implementation. This vulnerability occurs when handling large Path Maximum Transmission Unit (PMTU) transmissions, which can lead to Data Sequence Number (DSS) corruption. A remote attacker could exploit this flaw by sending specially crafted network packets, potentially causing a denial of service or data integrity issues within the TCP connection.
Statement
This seems to be a corruption and availability in the TCP protocol and its connection.
Mitigation
To mitigate this issue, disable Multipath TCP (MPTCP) if it is not actively used. MPTCP can be disabled by setting the `net.mptcp.enabled` sysctl to `0`.
bashTo make this change persistent across reboots, add the following line to a file in `/etc/sysctl.d/`, for example, `/etc/sysctl.d/99-disable-mptcp.conf`:
sysctl -w net.mptcp.enabled=0
net.mptcp.enabled = 0After modifying the sysctl configuration file, apply the changes by running `sysctl --system`. A system reboot may be required for the changes to take full effect.
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 | 7.1 | 7.5 | N/A |
| Attack Vector | Local | Network | N/A |
| Attack Complexity | Low | Low | N/A |
| Privileges Required | Low | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | None | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | High | High | N/A |
Vector
Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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)
Confidentiality,Integrity
Technical Impact: Read Memory; Modify Memory; Varies by Context
Frequently Asked Questions
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