SB20240608125 - Infinite loop in Linux kernel mptcp

Description

This security bulletin contains information about 1 vulnerability.

1) Infinite loop (CVE-ID: CVE-2021-47448)

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop within the mptcp_check_data_fin(), mptcp_data_ready(), mptcp_check_for_eof(), mptcp_wait_data(), mptcp_recvmsg(), tcp_recv_timestamp(), mptcp_check_fastclose(), mptcp_check_readable() and mptcp_poll() functions in net/mptcp/protocol.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/1a4554e94f0deff9fc1dc5addf93fa579cc29711
• https://git.kernel.org/stable/c/612f71d7328c14369924384ad2170aae2a6abd92
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.14
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15