CVE-2023-52434

CVE Details

Release Date:

2024-02-20

Description

In the Linux kernel, the following vulnerability has been resolved:\nsmb: client: fix potential OOBs in smb2_parse_contexts()\nValidate offsets and lengths before dereferencing create contexts in\nsmb2_parse_contexts().\nThis fixes following oops when accessing invalid create contexts from\nserver:\nBUG: unable to handle page fault for address: ffff8881178d8cc3\n#PF: supervisor read access in kernel mode\n#PF: error_code(0x0000) - not-present page\nPGD 4a01067 P4D 4a01067 PUD 0\nOops: 0000 [#1] PREEMPT SMP NOPTI\nCPU: 3 PID: 1736 Comm: mount.cifs Not tainted 6.7.0-rc4 #1\nHardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\nrel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\nRIP: 0010:smb2_parse_contexts+0xa0/0x3a0 [cifs]\nCode: f8 10 75 13 48 b8 93 ad 25 50 9c b4 11 e7 49 39 06 0f 84 d2 00\n00 00 8b 45 00 85 c0 74 61 41 29 c5 48 01 c5 41 83 fd 0f 76 55 <0f> b7\n7d 04 0f b7 45 06 4c 8d 74 3d 00 66 83 f8 04 75 bc ba 04 00\nRSP: 0018:ffffc900007939e0 EFLAGS: 00010216\nRAX: ffffc90000793c78 RBX: ffff8880180cc000 RCX: ffffc90000793c90\nRDX: ffffc90000793cc0 RSI: ffff8880178d8cc0 RDI: ffff8880180cc000\nRBP: ffff8881178d8cbf R08: ffffc90000793c22 R09: 0000000000000000\nR10: ffff8880180cc000 R11: 0000000000000024 R12: 0000000000000000\nR13: 0000000000000020 R14: 0000000000000000 R15: ffffc90000793c22\nFS: 00007f873753cbc0(0000) GS:ffff88806bc00000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: ffff8881178d8cc3 CR3: 00000000181ca000 CR4: 0000000000750ef0\nPKRU: 55555554\nCall Trace:\n\n? __die+0x23/0x70\n? page_fault_oops+0x181/0x480\n? search_module_extables+0x19/0x60\n? srso_alias_return_thunk+0x5/0xfbef5\n? exc_page_fault+0x1b6/0x1c0\n? asm_exc_page_fault+0x26/0x30\n? smb2_parse_contexts+0xa0/0x3a0 [cifs]\nSMB2_open+0x38d/0x5f0 [cifs]\n? smb2_is_path_accessible+0x138/0x260 [cifs]\nsmb2_is_path_accessible+0x138/0x260 [cifs]\ncifs_is_path_remote+0x8d/0x230 [cifs]\ncifs_mount+0x7e/0x350 [cifs]\ncifs_smb3_do_mount+0x128/0x780 [cifs]\nsmb3_get_tree+0xd9/0x290 [cifs]\nvfs_get_tree+0x2c/0x100\n? capable+0x37/0x70\npath_mount+0x2d7/0xb80\n? srso_alias_return_thunk+0x5/0xfbef5\n? _raw_spin_unlock_irqrestore+0x44/0x60\n__x64_sys_mount+0x11a/0x150\ndo_syscall_64+0x47/0xf0\nentry_SYSCALL_64_after_hwframe+0x6f/0x77\nRIP: 0033:0x7f8737657b1e

See more information about CVE-2023-52434 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score:	5.9	Base Metrics:	AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:H
Access Vector:	Adjacent network	Attack Complexity:	High
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	Low
Integrity Impact:	Low	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-3138	2024-05-23
Oracle Linux version 9 (kernel)	ELSA-2024-2394	2024-05-02

This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team