CVE-2024-36016

CVE Details

Release Date:

2024-05-29

Description

In the Linux kernel, the following vulnerability has been resolved:\ntty: n_gsm: fix possible out-of-bounds in gsm0_receive()\nAssuming the following:\n- side A configures the n_gsm in basic option mode\n- side B sends the header of a basic option mode frame with data length 1\n- side A switches to advanced option mode\n- side B sends 2 data bytes which exceeds gsm->len\nReason: gsm->len is not used in advanced option mode.\n- side A switches to basic option mode\n- side B keeps sending until gsm0_receive() writes past gsm->buf\nReason: Neither gsm->state nor gsm->len have been reset after\nreconfiguration.\nFix this by changing gsm->count to gsm->len comparison from equal to less\nthan. Also add upper limit checks against the constant MAX_MRU in\ngsm0_receive() and gsm1_receive() to harden against memory corruption of\ngsm->len and gsm->mru.\nAll other checks remain as we still need to limit the data according to the\nuser configuration and actual payload size.

See more information about CVE-2024-36016 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	6.4	CVSS Vector:	CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack Vector:	Adjacent network	Attack Complexity:	High
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	High
Integrity Impact:	High	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 6 (kernel-uek)	ELSA-2024-12606	2024-09-02
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12606	2024-09-02
Oracle Linux version 7 (kernel-uek)	ELSA-2024-12611	2024-09-11
Oracle Linux version 7 (kernel-uek-container)	ELSA-2024-12585	2024-08-12
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12581	2024-08-12
Oracle Linux version 8 (kernel-uek-container)	ELSA-2024-12584	2024-08-12
Oracle VM version 3 (kernel-uek)	OVMSA-2024-0011	2024-09-03