Bug 2173440 (CVE-2023-1078)

Summary:	CVE-2023-1078 kernel: Heap OOB Write in rds_rm_zerocopy_callback()
Product:	[Other] Security Response	Reporter:	Alex <allarkin>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	acaringi, arachman, bhu, chwhite, crwood, ddepaula, debarbos, dfreiber, dhoward, dvlasenk, ezulian, fhrbata, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, lgoncalv, lleshchi, lveyde, lzampier, michal.skrivanek, mperina, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, sbonazzo, scweaver, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.1.12	Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds memory access flaw was found in the Linux kernel's RDS (Reliable Datagram Sockets) protocol due to triggering rds_message_put(). This could allow a local user to crash the system or potentially escalate their privileges on the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-02-26 23:15:44 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2173441
Bug Blocks:	2172923

Description Alex 2023-02-26 17:47:15 UTC

A flaw found in the Linux Kernel in RDS (Reliable Datagram Sockets) protocol. The rds_rm_zerocopy_callback() uses list_entry() on the head of a list causing a type confusion. Local user can trigger this with rds_message_put(). Type confusion leads to `struct rds_msg_zcopy_info *info` actually points to something else that is potentially controlled by local user.
It is known how to trigger this, which causes an OOB access, and a lock corruption.

Reference:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=f753a68980cf4b59a80fe677619da2b1804f526d

Comment 1 Alex 2023-02-26 17:47:39 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2173441]

Comment 3 Justin M. Forbes 2023-03-01 19:54:14 UTC

This was fixed for Fedora with the 6.1.12 stable kernel updates.