CVE-2023-52775

CVE Details

Release Date:

2024-05-21

Description

In the Linux kernel, the following vulnerability has been resolved:\nnet/smc: avoid data corruption caused by decline\nWe found a data corruption issue during testing of SMC-R on Redis\napplications.\nThe benchmark has a low probability of reporting a strange error as\nshown below.\n'Error: Protocol error, got '\xe2' as reply type byte'\nFinally, we found that the retrieved error data was as follows:\n0xE2 0xD4 0xC3 0xD9 0x04 0x00 0x2C 0x20 0xA6 0x56 0x00 0x16 0x3E 0x0C\n0xCB 0x04 0x02 0x01 0x00 0x00 0x20 0x00 0x00 0x00 0x00 0x00 0x00 0x00\n0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xE2\nIt is quite obvious that this is a SMC DECLINE message, which means that\nthe applications received SMC protocol message.\nWe found that this was caused by the following situations:\nclient server\n| clc proposal\n------------->\n| clc accept\n<-------------\n| clc confirm\n------------->\nwait llc confirm\nsend llc confirm\n|failed llc confirm\n| x------\n(after 2s)timeout\nwait llc confirm rsp\nwait decline\n(after 1s) timeout\n(after 2s) timeout\n| decline\n-------------->\n| decline\n<--------------\nAs a result, a decline message was sent in the implementation, and this\nmessage was read from TCP by the already-fallback connection.\nThis patch double the client timeout as 2x of the server value,\nWith this simple change, the Decline messages should never cross or\ncollide (during Confirm link timeout).\nThis issue requires an immediate solution, since the protocol updates\ninvolve a more long-term solution.

See more information about CVE-2023-52775 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:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14